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Commit | Line | Data |
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223e47cc LB |
1 | // Decoding metadata from a single crate's metadata |
2 | ||
74b04a01 | 3 | use crate::creader::CrateMetadataRef; |
60c5eb7d | 4 | use crate::rmeta::table::{FixedSizeEncoding, Table}; |
dfeec247 | 5 | use crate::rmeta::*; |
9e0c209e | 6 | |
3dfed10e | 7 | use rustc_ast as ast; |
5e7ed085 | 8 | use rustc_ast::ptr::P; |
ba9703b0 | 9 | use rustc_attr as attr; |
dfeec247 | 10 | use rustc_data_structures::captures::Captures; |
dfeec247 XL |
11 | use rustc_data_structures::fx::FxHashMap; |
12 | use rustc_data_structures::svh::Svh; | |
5869c6ff XL |
13 | use rustc_data_structures::sync::{Lock, LockGuard, Lrc, OnceCell}; |
14 | use rustc_data_structures::unhash::UnhashMap; | |
ba9703b0 XL |
15 | use rustc_expand::base::{SyntaxExtension, SyntaxExtensionKind}; |
16 | use rustc_expand::proc_macro::{AttrProcMacro, BangProcMacro, ProcMacroDerive}; | |
dfeec247 | 17 | use rustc_hir::def::{CtorKind, CtorOf, DefKind, Res}; |
3dfed10e | 18 | use rustc_hir::def_id::{CrateNum, DefId, DefIndex, CRATE_DEF_INDEX, LOCAL_CRATE}; |
ba9703b0 | 19 | use rustc_hir::definitions::{DefKey, DefPath, DefPathData, DefPathHash}; |
c295e0f8 | 20 | use rustc_hir::diagnostic_items::DiagnosticItems; |
ba9703b0 | 21 | use rustc_hir::lang_items; |
dfeec247 | 22 | use rustc_index::vec::{Idx, IndexVec}; |
5e7ed085 | 23 | use rustc_middle::arena::ArenaAllocatable; |
5099ac24 | 24 | use rustc_middle::metadata::ModChild; |
ba9703b0 | 25 | use rustc_middle::middle::exported_symbols::{ExportedSymbol, SymbolExportLevel}; |
5e7ed085 | 26 | use rustc_middle::middle::stability::DeprecationEntry; |
ba9703b0 | 27 | use rustc_middle::mir::interpret::{AllocDecodingSession, AllocDecodingState}; |
c295e0f8 | 28 | use rustc_middle::thir; |
ba9703b0 | 29 | use rustc_middle::ty::codec::TyDecoder; |
a2a8927a | 30 | use rustc_middle::ty::fast_reject::SimplifiedType; |
17df50a5 | 31 | use rustc_middle::ty::{self, Ty, TyCtxt, Visibility}; |
3dfed10e | 32 | use rustc_serialize::{opaque, Decodable, Decoder}; |
c295e0f8 XL |
33 | use rustc_session::cstore::{ |
34 | CrateSource, ExternCrate, ForeignModule, LinkagePreference, NativeLib, | |
35 | }; | |
ba9703b0 | 36 | use rustc_session::Session; |
136023e0 | 37 | use rustc_span::hygiene::{ExpnIndex, MacroKind}; |
ba9703b0 | 38 | use rustc_span::source_map::{respan, Spanned}; |
f9f354fc | 39 | use rustc_span::symbol::{sym, Ident, Symbol}; |
136023e0 | 40 | use rustc_span::{self, BytePos, ExpnId, Pos, Span, SyntaxContext, DUMMY_SP}; |
9cc50fc6 | 41 | |
ba9703b0 | 42 | use proc_macro::bridge::client::ProcMacro; |
c34b1796 | 43 | use std::io; |
9e0c209e | 44 | use std::mem; |
e74abb32 | 45 | use std::num::NonZeroUsize; |
ba9703b0 | 46 | use std::path::Path; |
3dfed10e | 47 | use tracing::debug; |
223e47cc | 48 | |
a2a8927a XL |
49 | pub(super) use cstore_impl::provide; |
50 | pub use cstore_impl::provide_extern; | |
3dfed10e | 51 | use rustc_span::hygiene::HygieneDecodeContext; |
60c5eb7d XL |
52 | |
53 | mod cstore_impl; | |
54 | ||
c295e0f8 XL |
55 | /// A reference to the raw binary version of crate metadata. |
56 | /// A `MetadataBlob` internally is just a reference counted pointer to | |
57 | /// the actual data, so cloning it is cheap. | |
58 | #[derive(Clone)] | |
59 | crate struct MetadataBlob(Lrc<MetadataRef>); | |
60 | ||
61 | // This is needed so we can create an OwningRef into the blob. | |
62 | // The data behind a `MetadataBlob` has a stable address because it is | |
63 | // contained within an Rc/Arc. | |
64 | unsafe impl rustc_data_structures::owning_ref::StableAddress for MetadataBlob {} | |
65 | ||
66 | // This is needed so we can create an OwningRef into the blob. | |
67 | impl std::ops::Deref for MetadataBlob { | |
68 | type Target = [u8]; | |
69 | ||
70 | #[inline] | |
71 | fn deref(&self) -> &[u8] { | |
72 | &self.0[..] | |
73 | } | |
74 | } | |
60c5eb7d XL |
75 | |
76 | // A map from external crate numbers (as decoded from some crate file) to | |
77 | // local crate numbers (as generated during this session). Each external | |
78 | // crate may refer to types in other external crates, and each has their | |
79 | // own crate numbers. | |
80 | crate type CrateNumMap = IndexVec<CrateNum, CrateNum>; | |
81 | ||
82 | crate struct CrateMetadata { | |
83 | /// The primary crate data - binary metadata blob. | |
84 | blob: MetadataBlob, | |
85 | ||
86 | // --- Some data pre-decoded from the metadata blob, usually for performance --- | |
60c5eb7d XL |
87 | /// Properties of the whole crate. |
88 | /// NOTE(eddyb) we pass `'static` to a `'tcx` parameter because this | |
94222f64 | 89 | /// lifetime is only used behind `Lazy`, and therefore acts like a |
60c5eb7d XL |
90 | /// universal (`for<'tcx>`), that is paired up with whichever `TyCtxt` |
91 | /// is being used to decode those values. | |
92 | root: CrateRoot<'static>, | |
60c5eb7d XL |
93 | /// Trait impl data. |
94 | /// FIXME: Used only from queries and can use query cache, | |
95 | /// so pre-decoding can probably be avoided. | |
a2a8927a | 96 | trait_impls: FxHashMap<(u32, DefIndex), Lazy<[(DefIndex, Option<SimplifiedType>)]>>, |
5e7ed085 FG |
97 | /// Inherent impls which do not follow the normal coherence rules. |
98 | /// | |
99 | /// These can be introduced using either `#![rustc_coherence_is_core]` | |
100 | /// or `#[rustc_allow_incoherent_impl]`. | |
101 | incoherent_impls: FxHashMap<SimplifiedType, Lazy<[DefIndex]>>, | |
60c5eb7d XL |
102 | /// Proc macro descriptions for this crate, if it's a proc macro crate. |
103 | raw_proc_macros: Option<&'static [ProcMacro]>, | |
104 | /// Source maps for code from the crate. | |
f9f354fc | 105 | source_map_import_info: OnceCell<Vec<ImportedSourceFile>>, |
c295e0f8 XL |
106 | /// For every definition in this crate, maps its `DefPathHash` to its `DefIndex`. |
107 | def_path_hash_map: DefPathHashMapRef<'static>, | |
136023e0 XL |
108 | /// Likewise for ExpnHash. |
109 | expn_hash_map: OnceCell<UnhashMap<ExpnHash, ExpnIndex>>, | |
60c5eb7d XL |
110 | /// Used for decoding interpret::AllocIds in a cached & thread-safe manner. |
111 | alloc_decoding_state: AllocDecodingState, | |
3dfed10e XL |
112 | /// Caches decoded `DefKey`s. |
113 | def_key_cache: Lock<FxHashMap<DefIndex, DefKey>>, | |
114 | /// Caches decoded `DefPathHash`es. | |
115 | def_path_hash_cache: Lock<FxHashMap<DefIndex, DefPathHash>>, | |
60c5eb7d XL |
116 | |
117 | // --- Other significant crate properties --- | |
60c5eb7d XL |
118 | /// ID of this crate, from the current compilation session's point of view. |
119 | cnum: CrateNum, | |
120 | /// Maps crate IDs as they are were seen from this crate's compilation sessions into | |
121 | /// IDs as they are seen from the current compilation session. | |
122 | cnum_map: CrateNumMap, | |
123 | /// Same ID set as `cnum_map` plus maybe some injected crates like panic runtime. | |
124 | dependencies: Lock<Vec<CrateNum>>, | |
125 | /// How to link (or not link) this crate to the currently compiled crate. | |
3dfed10e | 126 | dep_kind: Lock<CrateDepKind>, |
60c5eb7d | 127 | /// Filesystem location of this crate. |
5099ac24 | 128 | source: Lrc<CrateSource>, |
60c5eb7d XL |
129 | /// Whether or not this crate should be consider a private dependency |
130 | /// for purposes of the 'exported_private_dependencies' lint | |
131 | private_dep: bool, | |
132 | /// The hash for the host proc macro. Used to support `-Z dual-proc-macro`. | |
133 | host_hash: Option<Svh>, | |
134 | ||
3dfed10e XL |
135 | /// Additional data used for decoding `HygieneData` (e.g. `SyntaxContext` |
136 | /// and `ExpnId`). | |
137 | /// Note that we store a `HygieneDecodeContext` for each `CrateMetadat`. This is | |
138 | /// because `SyntaxContext` ids are not globally unique, so we need | |
139 | /// to track which ids we've decoded on a per-crate basis. | |
140 | hygiene_context: HygieneDecodeContext, | |
141 | ||
60c5eb7d | 142 | // --- Data used only for improving diagnostics --- |
60c5eb7d XL |
143 | /// Information about the `extern crate` item or path that caused this crate to be loaded. |
144 | /// If this is `None`, then the crate was injected (e.g., by the allocator). | |
145 | extern_crate: Lock<Option<ExternCrate>>, | |
146 | } | |
147 | ||
dfeec247 | 148 | /// Holds information about a rustc_span::SourceFile imported from another crate. |
60c5eb7d XL |
149 | /// See `imported_source_files()` for more information. |
150 | struct ImportedSourceFile { | |
151 | /// This SourceFile's byte-offset within the source_map of its original crate | |
dfeec247 | 152 | original_start_pos: rustc_span::BytePos, |
60c5eb7d | 153 | /// The end of this SourceFile within the source_map of its original crate |
dfeec247 | 154 | original_end_pos: rustc_span::BytePos, |
60c5eb7d | 155 | /// The imported SourceFile's representation within the local source_map |
dfeec247 | 156 | translated_source_file: Lrc<rustc_span::SourceFile>, |
60c5eb7d XL |
157 | } |
158 | ||
159 | pub(super) struct DecodeContext<'a, 'tcx> { | |
9e0c209e | 160 | opaque: opaque::Decoder<'a>, |
74b04a01 | 161 | cdata: Option<CrateMetadataRef<'a>>, |
c295e0f8 | 162 | blob: &'a MetadataBlob, |
dc9dc135 XL |
163 | sess: Option<&'tcx Session>, |
164 | tcx: Option<TyCtxt<'tcx>>, | |
c34b1796 | 165 | |
b7449926 XL |
166 | // Cache the last used source_file for translating spans as an optimization. |
167 | last_source_file_index: usize, | |
223e47cc | 168 | |
c30ab7b3 | 169 | lazy_state: LazyState, |
0531ce1d | 170 | |
94b46f34 XL |
171 | // Used for decoding interpret::AllocIds in a cached & thread-safe manner. |
172 | alloc_decoding_session: Option<AllocDecodingSession<'a>>, | |
223e47cc LB |
173 | } |
174 | ||
9e0c209e | 175 | /// Abstract over the various ways one can create metadata decoders. |
60c5eb7d | 176 | pub(super) trait Metadata<'a, 'tcx>: Copy { |
c295e0f8 XL |
177 | fn blob(self) -> &'a MetadataBlob; |
178 | ||
74b04a01 | 179 | fn cdata(self) -> Option<CrateMetadataRef<'a>> { |
dfeec247 XL |
180 | None |
181 | } | |
182 | fn sess(self) -> Option<&'tcx Session> { | |
183 | None | |
184 | } | |
185 | fn tcx(self) -> Option<TyCtxt<'tcx>> { | |
186 | None | |
187 | } | |
b039eaaf | 188 | |
9e0c209e | 189 | fn decoder(self, pos: usize) -> DecodeContext<'a, 'tcx> { |
476ff2be | 190 | let tcx = self.tcx(); |
9e0c209e | 191 | DecodeContext { |
c295e0f8 | 192 | opaque: opaque::Decoder::new(self.blob(), pos), |
9e0c209e | 193 | cdata: self.cdata(), |
c295e0f8 | 194 | blob: self.blob(), |
476ff2be | 195 | sess: self.sess().or(tcx.map(|tcx| tcx.sess)), |
3b2f2976 | 196 | tcx, |
b7449926 | 197 | last_source_file_index: 0, |
c30ab7b3 | 198 | lazy_state: LazyState::NoNode, |
dfeec247 XL |
199 | alloc_decoding_session: self |
200 | .cdata() | |
74b04a01 | 201 | .map(|cdata| cdata.cdata.alloc_decoding_state.new_decoding_session()), |
9e0c209e SL |
202 | } |
203 | } | |
b039eaaf SL |
204 | } |
205 | ||
9e0c209e | 206 | impl<'a, 'tcx> Metadata<'a, 'tcx> for &'a MetadataBlob { |
c295e0f8 XL |
207 | #[inline] |
208 | fn blob(self) -> &'a MetadataBlob { | |
209 | self | |
9e0c209e | 210 | } |
223e47cc LB |
211 | } |
212 | ||
dc9dc135 | 213 | impl<'a, 'tcx> Metadata<'a, 'tcx> for (&'a MetadataBlob, &'tcx Session) { |
c295e0f8 XL |
214 | #[inline] |
215 | fn blob(self) -> &'a MetadataBlob { | |
216 | self.0 | |
abe05a73 XL |
217 | } |
218 | ||
c295e0f8 | 219 | #[inline] |
dc9dc135 | 220 | fn sess(self) -> Option<&'tcx Session> { |
abe05a73 XL |
221 | let (_, sess) = self; |
222 | Some(sess) | |
223 | } | |
224 | } | |
225 | ||
5099ac24 | 226 | impl<'a, 'tcx> Metadata<'a, 'tcx> for CrateMetadataRef<'a> { |
c295e0f8 XL |
227 | #[inline] |
228 | fn blob(self) -> &'a MetadataBlob { | |
5099ac24 | 229 | &self.cdata.blob |
c30ab7b3 | 230 | } |
c295e0f8 | 231 | #[inline] |
74b04a01 | 232 | fn cdata(self) -> Option<CrateMetadataRef<'a>> { |
5099ac24 | 233 | Some(self) |
c30ab7b3 | 234 | } |
a7813a04 XL |
235 | } |
236 | ||
5099ac24 | 237 | impl<'a, 'tcx> Metadata<'a, 'tcx> for (CrateMetadataRef<'a>, &'tcx Session) { |
c295e0f8 XL |
238 | #[inline] |
239 | fn blob(self) -> &'a MetadataBlob { | |
5099ac24 | 240 | &self.0.cdata.blob |
476ff2be | 241 | } |
c295e0f8 | 242 | #[inline] |
74b04a01 | 243 | fn cdata(self) -> Option<CrateMetadataRef<'a>> { |
5099ac24 | 244 | Some(self.0) |
476ff2be | 245 | } |
c295e0f8 | 246 | #[inline] |
dc9dc135 | 247 | fn sess(self) -> Option<&'tcx Session> { |
5099ac24 | 248 | Some(self.1) |
476ff2be SL |
249 | } |
250 | } | |
251 | ||
5099ac24 | 252 | impl<'a, 'tcx> Metadata<'a, 'tcx> for (CrateMetadataRef<'a>, TyCtxt<'tcx>) { |
c295e0f8 XL |
253 | #[inline] |
254 | fn blob(self) -> &'a MetadataBlob { | |
5099ac24 | 255 | &self.0.cdata.blob |
c30ab7b3 | 256 | } |
c295e0f8 | 257 | #[inline] |
74b04a01 | 258 | fn cdata(self) -> Option<CrateMetadataRef<'a>> { |
5099ac24 | 259 | Some(self.0) |
c30ab7b3 | 260 | } |
c295e0f8 | 261 | #[inline] |
dc9dc135 | 262 | fn tcx(self) -> Option<TyCtxt<'tcx>> { |
c30ab7b3 SL |
263 | Some(self.1) |
264 | } | |
223e47cc LB |
265 | } |
266 | ||
3dfed10e | 267 | impl<'a, 'tcx, T: Decodable<DecodeContext<'a, 'tcx>>> Lazy<T> { |
60c5eb7d | 268 | fn decode<M: Metadata<'a, 'tcx>>(self, metadata: M) -> T { |
e74abb32 | 269 | let mut dcx = metadata.decoder(self.position.get()); |
9e0c209e | 270 | dcx.lazy_state = LazyState::NodeStart(self.position); |
5099ac24 | 271 | T::decode(&mut dcx) |
54a0048b SL |
272 | } |
273 | } | |
274 | ||
3dfed10e | 275 | impl<'a: 'x, 'tcx: 'x, 'x, T: Decodable<DecodeContext<'a, 'tcx>>> Lazy<[T]> { |
60c5eb7d | 276 | fn decode<M: Metadata<'a, 'tcx>>( |
0531ce1d | 277 | self, |
e74abb32 | 278 | metadata: M, |
e1599b0c | 279 | ) -> impl ExactSizeIterator<Item = T> + Captures<'a> + Captures<'tcx> + 'x { |
e74abb32 | 280 | let mut dcx = metadata.decoder(self.position.get()); |
9e0c209e | 281 | dcx.lazy_state = LazyState::NodeStart(self.position); |
5099ac24 | 282 | (0..self.meta).map(move |_| T::decode(&mut dcx)) |
62682a34 SL |
283 | } |
284 | } | |
285 | ||
5e7ed085 FG |
286 | trait LazyQueryDecodable<'a, 'tcx, T> { |
287 | fn decode_query( | |
288 | self, | |
289 | cdata: CrateMetadataRef<'a>, | |
290 | tcx: TyCtxt<'tcx>, | |
291 | err: impl FnOnce() -> !, | |
292 | ) -> T; | |
293 | } | |
294 | ||
295 | impl<'a, 'tcx, T> LazyQueryDecodable<'a, 'tcx, T> for Option<Lazy<T>> | |
296 | where | |
297 | T: Decodable<DecodeContext<'a, 'tcx>>, | |
298 | { | |
299 | fn decode_query( | |
300 | self, | |
301 | cdata: CrateMetadataRef<'a>, | |
302 | tcx: TyCtxt<'tcx>, | |
303 | err: impl FnOnce() -> !, | |
304 | ) -> T { | |
305 | if let Some(l) = self { l.decode((cdata, tcx)) } else { err() } | |
306 | } | |
307 | } | |
308 | ||
309 | impl<'a, 'tcx, T> LazyQueryDecodable<'a, 'tcx, &'tcx T> for Option<Lazy<T>> | |
310 | where | |
311 | T: Decodable<DecodeContext<'a, 'tcx>>, | |
312 | T: ArenaAllocatable<'tcx>, | |
313 | { | |
314 | fn decode_query( | |
315 | self, | |
316 | cdata: CrateMetadataRef<'a>, | |
317 | tcx: TyCtxt<'tcx>, | |
318 | err: impl FnOnce() -> !, | |
319 | ) -> &'tcx T { | |
320 | if let Some(l) = self { tcx.arena.alloc(l.decode((cdata, tcx))) } else { err() } | |
321 | } | |
322 | } | |
323 | ||
324 | impl<'a, 'tcx, T> LazyQueryDecodable<'a, 'tcx, Option<T>> for Option<Lazy<T>> | |
325 | where | |
326 | T: Decodable<DecodeContext<'a, 'tcx>>, | |
327 | { | |
328 | fn decode_query( | |
329 | self, | |
330 | cdata: CrateMetadataRef<'a>, | |
331 | tcx: TyCtxt<'tcx>, | |
332 | _err: impl FnOnce() -> !, | |
333 | ) -> Option<T> { | |
334 | self.map(|l| l.decode((cdata, tcx))) | |
335 | } | |
336 | } | |
337 | ||
338 | impl<'a, 'tcx, T, E> LazyQueryDecodable<'a, 'tcx, Result<Option<T>, E>> for Option<Lazy<T>> | |
339 | where | |
340 | T: Decodable<DecodeContext<'a, 'tcx>>, | |
341 | { | |
342 | fn decode_query( | |
343 | self, | |
344 | cdata: CrateMetadataRef<'a>, | |
345 | tcx: TyCtxt<'tcx>, | |
346 | _err: impl FnOnce() -> !, | |
347 | ) -> Result<Option<T>, E> { | |
348 | Ok(self.map(|l| l.decode((cdata, tcx)))) | |
349 | } | |
350 | } | |
351 | ||
352 | impl<'a, 'tcx, T> LazyQueryDecodable<'a, 'tcx, &'tcx [T]> for Option<Lazy<[T], usize>> | |
353 | where | |
354 | T: Decodable<DecodeContext<'a, 'tcx>> + Copy, | |
355 | { | |
356 | fn decode_query( | |
357 | self, | |
358 | cdata: CrateMetadataRef<'a>, | |
359 | tcx: TyCtxt<'tcx>, | |
360 | _err: impl FnOnce() -> !, | |
361 | ) -> &'tcx [T] { | |
362 | if let Some(l) = self { tcx.arena.alloc_from_iter(l.decode((cdata, tcx))) } else { &[] } | |
363 | } | |
364 | } | |
365 | ||
366 | impl<'a, 'tcx> LazyQueryDecodable<'a, 'tcx, Option<DeprecationEntry>> | |
367 | for Option<Lazy<attr::Deprecation>> | |
368 | { | |
369 | fn decode_query( | |
370 | self, | |
371 | cdata: CrateMetadataRef<'a>, | |
372 | tcx: TyCtxt<'tcx>, | |
373 | _err: impl FnOnce() -> !, | |
374 | ) -> Option<DeprecationEntry> { | |
375 | self.map(|l| l.decode((cdata, tcx))).map(DeprecationEntry::external) | |
376 | } | |
377 | } | |
378 | ||
9e0c209e | 379 | impl<'a, 'tcx> DecodeContext<'a, 'tcx> { |
c295e0f8 | 380 | #[inline] |
e74abb32 | 381 | fn tcx(&self) -> TyCtxt<'tcx> { |
c295e0f8 XL |
382 | debug_assert!(self.tcx.is_some(), "missing TyCtxt in DecodeContext"); |
383 | self.tcx.unwrap() | |
384 | } | |
385 | ||
386 | #[inline] | |
387 | pub fn blob(&self) -> &'a MetadataBlob { | |
388 | self.blob | |
9e0c209e | 389 | } |
223e47cc | 390 | |
c295e0f8 XL |
391 | #[inline] |
392 | pub fn cdata(&self) -> CrateMetadataRef<'a> { | |
393 | debug_assert!(self.cdata.is_some(), "missing CrateMetadata in DecodeContext"); | |
394 | self.cdata.unwrap() | |
9e0c209e | 395 | } |
a7813a04 | 396 | |
17df50a5 XL |
397 | fn map_encoded_cnum_to_current(&self, cnum: CrateNum) -> CrateNum { |
398 | if cnum == LOCAL_CRATE { self.cdata().cnum } else { self.cdata().cnum_map[cnum] } | |
399 | } | |
400 | ||
5099ac24 FG |
401 | fn read_lazy_with_meta<T: ?Sized + LazyMeta>(&mut self, meta: T::Meta) -> Lazy<T> { |
402 | let distance = self.read_usize(); | |
9e0c209e | 403 | let position = match self.lazy_state { |
e1599b0c | 404 | LazyState::NoNode => bug!("read_lazy_with_meta: outside of a metadata node"), |
9e0c209e | 405 | LazyState::NodeStart(start) => { |
e74abb32 | 406 | let start = start.get(); |
5099ac24 FG |
407 | assert!(distance <= start); |
408 | start - distance | |
9e0c209e | 409 | } |
5099ac24 | 410 | LazyState::Previous(last_pos) => last_pos.get() + distance, |
9e0c209e | 411 | }; |
5099ac24 FG |
412 | self.lazy_state = LazyState::Previous(NonZeroUsize::new(position).unwrap()); |
413 | Lazy::from_position_and_meta(NonZeroUsize::new(position).unwrap(), meta) | |
9e0c209e | 414 | } |
c295e0f8 XL |
415 | |
416 | #[inline] | |
5e7ed085 | 417 | pub fn read_raw_bytes(&mut self, len: usize) -> &[u8] { |
c295e0f8 XL |
418 | self.opaque.read_raw_bytes(len) |
419 | } | |
223e47cc LB |
420 | } |
421 | ||
dc9dc135 | 422 | impl<'a, 'tcx> TyDecoder<'tcx> for DecodeContext<'a, 'tcx> { |
3dfed10e XL |
423 | const CLEAR_CROSS_CRATE: bool = true; |
424 | ||
abe05a73 | 425 | #[inline] |
dc9dc135 | 426 | fn tcx(&self) -> TyCtxt<'tcx> { |
abe05a73 XL |
427 | self.tcx.expect("missing TyCtxt in DecodeContext") |
428 | } | |
429 | ||
430 | #[inline] | |
431 | fn peek_byte(&self) -> u8 { | |
432 | self.opaque.data[self.opaque.position()] | |
9e0c209e | 433 | } |
223e47cc | 434 | |
abe05a73 XL |
435 | #[inline] |
436 | fn position(&self) -> usize { | |
437 | self.opaque.position() | |
438 | } | |
223e47cc | 439 | |
5099ac24 | 440 | fn cached_ty_for_shorthand<F>(&mut self, shorthand: usize, or_insert_with: F) -> Ty<'tcx> |
dfeec247 | 441 | where |
5099ac24 | 442 | F: FnOnce(&mut Self) -> Ty<'tcx>, |
abe05a73 XL |
443 | { |
444 | let tcx = self.tcx(); | |
223e47cc | 445 | |
17df50a5 | 446 | let key = ty::CReaderCacheKey { cnum: Some(self.cdata().cnum), pos: shorthand }; |
1a4d82fc | 447 | |
f035d41b | 448 | if let Some(&ty) = tcx.ty_rcache.borrow().get(&key) { |
5099ac24 | 449 | return ty; |
abe05a73 | 450 | } |
223e47cc | 451 | |
5099ac24 | 452 | let ty = or_insert_with(self); |
f035d41b | 453 | tcx.ty_rcache.borrow_mut().insert(key, ty); |
5099ac24 | 454 | ty |
9e0c209e | 455 | } |
62682a34 | 456 | |
abe05a73 | 457 | fn with_position<F, R>(&mut self, pos: usize, f: F) -> R |
dfeec247 XL |
458 | where |
459 | F: FnOnce(&mut Self) -> R, | |
abe05a73 XL |
460 | { |
461 | let new_opaque = opaque::Decoder::new(self.opaque.data, pos); | |
462 | let old_opaque = mem::replace(&mut self.opaque, new_opaque); | |
463 | let old_state = mem::replace(&mut self.lazy_state, LazyState::NoNode); | |
464 | let r = f(self); | |
465 | self.opaque = old_opaque; | |
466 | self.lazy_state = old_state; | |
467 | r | |
468 | } | |
469 | ||
5099ac24 | 470 | fn decode_alloc_id(&mut self) -> rustc_middle::mir::interpret::AllocId { |
3dfed10e XL |
471 | if let Some(alloc_decoding_session) = self.alloc_decoding_session { |
472 | alloc_decoding_session.decode_alloc_id(self) | |
473 | } else { | |
474 | bug!("Attempting to decode interpret::AllocId without CrateMetadata") | |
475 | } | |
9e0c209e | 476 | } |
223e47cc LB |
477 | } |
478 | ||
3dfed10e | 479 | impl<'a, 'tcx> Decodable<DecodeContext<'a, 'tcx>> for CrateNum { |
5099ac24 FG |
480 | fn decode(d: &mut DecodeContext<'a, 'tcx>) -> CrateNum { |
481 | let cnum = CrateNum::from_u32(d.read_u32()); | |
482 | d.map_encoded_cnum_to_current(cnum) | |
9e0c209e | 483 | } |
970d7e83 LB |
484 | } |
485 | ||
3dfed10e | 486 | impl<'a, 'tcx> Decodable<DecodeContext<'a, 'tcx>> for DefIndex { |
5099ac24 FG |
487 | fn decode(d: &mut DecodeContext<'a, 'tcx>) -> DefIndex { |
488 | DefIndex::from_u32(d.read_u32()) | |
e74abb32 XL |
489 | } |
490 | } | |
abe05a73 | 491 | |
136023e0 | 492 | impl<'a, 'tcx> Decodable<DecodeContext<'a, 'tcx>> for ExpnIndex { |
5099ac24 FG |
493 | fn decode(d: &mut DecodeContext<'a, 'tcx>) -> ExpnIndex { |
494 | ExpnIndex::from_u32(d.read_u32()) | |
136023e0 XL |
495 | } |
496 | } | |
497 | ||
3dfed10e | 498 | impl<'a, 'tcx> Decodable<DecodeContext<'a, 'tcx>> for SyntaxContext { |
5099ac24 | 499 | fn decode(decoder: &mut DecodeContext<'a, 'tcx>) -> SyntaxContext { |
3dfed10e XL |
500 | let cdata = decoder.cdata(); |
501 | let sess = decoder.sess.unwrap(); | |
502 | let cname = cdata.root.name; | |
503 | rustc_span::hygiene::decode_syntax_context(decoder, &cdata.hygiene_context, |_, id| { | |
504 | debug!("SpecializedDecoder<SyntaxContext>: decoding {}", id); | |
5099ac24 | 505 | cdata |
3dfed10e XL |
506 | .root |
507 | .syntax_contexts | |
5099ac24 | 508 | .get(cdata, id) |
3dfed10e | 509 | .unwrap_or_else(|| panic!("Missing SyntaxContext {:?} for crate {:?}", id, cname)) |
5099ac24 | 510 | .decode((cdata, sess)) |
3dfed10e | 511 | }) |
1a4d82fc JJ |
512 | } |
513 | } | |
514 | ||
3dfed10e | 515 | impl<'a, 'tcx> Decodable<DecodeContext<'a, 'tcx>> for ExpnId { |
5099ac24 | 516 | fn decode(decoder: &mut DecodeContext<'a, 'tcx>) -> ExpnId { |
3dfed10e XL |
517 | let local_cdata = decoder.cdata(); |
518 | let sess = decoder.sess.unwrap(); | |
0531ce1d | 519 | |
5099ac24 FG |
520 | let cnum = CrateNum::decode(decoder); |
521 | let index = u32::decode(decoder); | |
136023e0 XL |
522 | |
523 | let expn_id = rustc_span::hygiene::decode_expn_id(cnum, index, |expn_id| { | |
524 | let ExpnId { krate: cnum, local_id: index } = expn_id; | |
525 | // Lookup local `ExpnData`s in our own crate data. Foreign `ExpnData`s | |
526 | // are stored in the owning crate, to avoid duplication. | |
527 | debug_assert_ne!(cnum, LOCAL_CRATE); | |
528 | let crate_data = if cnum == local_cdata.cnum { | |
529 | local_cdata | |
530 | } else { | |
531 | local_cdata.cstore.get_crate_data(cnum) | |
532 | }; | |
533 | let expn_data = crate_data | |
534 | .root | |
535 | .expn_data | |
5099ac24 | 536 | .get(crate_data, index) |
136023e0 | 537 | .unwrap() |
5099ac24 | 538 | .decode((crate_data, sess)); |
136023e0 XL |
539 | let expn_hash = crate_data |
540 | .root | |
541 | .expn_hashes | |
5099ac24 | 542 | .get(crate_data, index) |
136023e0 | 543 | .unwrap() |
5099ac24 | 544 | .decode((crate_data, sess)); |
136023e0 XL |
545 | (expn_data, expn_hash) |
546 | }); | |
5099ac24 | 547 | expn_id |
0531ce1d XL |
548 | } |
549 | } | |
550 | ||
3dfed10e | 551 | impl<'a, 'tcx> Decodable<DecodeContext<'a, 'tcx>> for Span { |
5099ac24 FG |
552 | fn decode(decoder: &mut DecodeContext<'a, 'tcx>) -> Span { |
553 | let ctxt = SyntaxContext::decode(decoder); | |
554 | let tag = u8::decode(decoder); | |
85aaf69f | 555 | |
cdc7bbd5 | 556 | if tag == TAG_PARTIAL_SPAN { |
5099ac24 | 557 | return DUMMY_SP.with_ctxt(ctxt); |
ff7c6d11 XL |
558 | } |
559 | ||
ba9703b0 | 560 | debug_assert!(tag == TAG_VALID_SPAN_LOCAL || tag == TAG_VALID_SPAN_FOREIGN); |
2c00a5a8 | 561 | |
5099ac24 FG |
562 | let lo = BytePos::decode(decoder); |
563 | let len = BytePos::decode(decoder); | |
2c00a5a8 | 564 | let hi = lo + len; |
ff7c6d11 | 565 | |
3c0e092e | 566 | let Some(sess) = decoder.sess else { |
abe05a73 | 567 | bug!("Cannot decode Span without Session.") |
9e0c209e | 568 | }; |
85aaf69f | 569 | |
ba9703b0 XL |
570 | // There are two possibilities here: |
571 | // 1. This is a 'local span', which is located inside a `SourceFile` | |
572 | // that came from this crate. In this case, we use the source map data | |
573 | // encoded in this crate. This branch should be taken nearly all of the time. | |
574 | // 2. This is a 'foreign span', which is located inside a `SourceFile` | |
575 | // that came from a *different* crate (some crate upstream of the one | |
576 | // whose metadata we're looking at). For example, consider this dependency graph: | |
577 | // | |
578 | // A -> B -> C | |
579 | // | |
580 | // Suppose that we're currently compiling crate A, and start deserializing | |
581 | // metadata from crate B. When we deserialize a Span from crate B's metadata, | |
5e7ed085 | 582 | // there are two possibilities: |
ba9703b0 XL |
583 | // |
584 | // 1. The span references a file from crate B. This makes it a 'local' span, | |
585 | // which means that we can use crate B's serialized source map information. | |
586 | // 2. The span references a file from crate C. This makes it a 'foreign' span, | |
587 | // which means we need to use Crate *C* (not crate B) to determine the source | |
588 | // map information. We only record source map information for a file in the | |
589 | // crate that 'owns' it, so deserializing a Span may require us to look at | |
590 | // a transitive dependency. | |
591 | // | |
592 | // When we encode a foreign span, we adjust its 'lo' and 'high' values | |
593 | // to be based on the *foreign* crate (e.g. crate C), not the crate | |
594 | // we are writing metadata for (e.g. crate B). This allows us to | |
595 | // treat the 'local' and 'foreign' cases almost identically during deserialization: | |
596 | // we can call `imported_source_files` for the proper crate, and binary search | |
597 | // through the returned slice using our span. | |
598 | let imported_source_files = if tag == TAG_VALID_SPAN_LOCAL { | |
3dfed10e | 599 | decoder.cdata().imported_source_files(sess) |
ba9703b0 | 600 | } else { |
f035d41b XL |
601 | // When we encode a proc-macro crate, all `Span`s should be encoded |
602 | // with `TAG_VALID_SPAN_LOCAL` | |
3dfed10e | 603 | if decoder.cdata().root.is_proc_macro_crate() { |
ba9703b0 XL |
604 | // Decode `CrateNum` as u32 - using `CrateNum::decode` will ICE |
605 | // since we don't have `cnum_map` populated. | |
5099ac24 | 606 | let cnum = u32::decode(decoder); |
f035d41b XL |
607 | panic!( |
608 | "Decoding of crate {:?} tried to access proc-macro dep {:?}", | |
3dfed10e | 609 | decoder.cdata().root.name, |
f035d41b XL |
610 | cnum |
611 | ); | |
ba9703b0 XL |
612 | } |
613 | // tag is TAG_VALID_SPAN_FOREIGN, checked by `debug_assert` above | |
5099ac24 | 614 | let cnum = CrateNum::decode(decoder); |
ba9703b0 XL |
615 | debug!( |
616 | "SpecializedDecoder<Span>::specialized_decode: loading source files from cnum {:?}", | |
617 | cnum | |
618 | ); | |
619 | ||
620 | // Decoding 'foreign' spans should be rare enough that it's | |
621 | // not worth it to maintain a per-CrateNum cache for `last_source_file_index`. | |
622 | // We just set it to 0, to ensure that we don't try to access something out | |
623 | // of bounds for our initial 'guess' | |
3dfed10e | 624 | decoder.last_source_file_index = 0; |
ba9703b0 | 625 | |
3dfed10e | 626 | let foreign_data = decoder.cdata().cstore.get_crate_data(cnum); |
ba9703b0 XL |
627 | foreign_data.imported_source_files(sess) |
628 | }; | |
629 | ||
b7449926 | 630 | let source_file = { |
9e0c209e | 631 | // Optimize for the case that most spans within a translated item |
b7449926 | 632 | // originate from the same source_file. |
3dfed10e | 633 | let last_source_file = &imported_source_files[decoder.last_source_file_index]; |
9e0c209e | 634 | |
dfeec247 XL |
635 | if lo >= last_source_file.original_start_pos && lo <= last_source_file.original_end_pos |
636 | { | |
b7449926 | 637 | last_source_file |
9e0c209e | 638 | } else { |
74b04a01 XL |
639 | let index = imported_source_files |
640 | .binary_search_by_key(&lo, |source_file| source_file.original_start_pos) | |
641 | .unwrap_or_else(|index| index - 1); | |
e9174d1e | 642 | |
ba9703b0 XL |
643 | // Don't try to cache the index for foreign spans, |
644 | // as this would require a map from CrateNums to indices | |
645 | if tag == TAG_VALID_SPAN_LOCAL { | |
3dfed10e | 646 | decoder.last_source_file_index = index; |
ba9703b0 | 647 | } |
74b04a01 | 648 | &imported_source_files[index] |
e9174d1e | 649 | } |
9e0c209e SL |
650 | }; |
651 | ||
ff7c6d11 | 652 | // Make sure our binary search above is correct. |
ba9703b0 XL |
653 | debug_assert!( |
654 | lo >= source_file.original_start_pos && lo <= source_file.original_end_pos, | |
655 | "Bad binary search: lo={:?} source_file.original_start_pos={:?} source_file.original_end_pos={:?}", | |
656 | lo, | |
657 | source_file.original_start_pos, | |
658 | source_file.original_end_pos | |
659 | ); | |
ff7c6d11 | 660 | |
2c00a5a8 | 661 | // Make sure we correctly filtered out invalid spans during encoding |
ba9703b0 XL |
662 | debug_assert!( |
663 | hi >= source_file.original_start_pos && hi <= source_file.original_end_pos, | |
664 | "Bad binary search: hi={:?} source_file.original_start_pos={:?} source_file.original_end_pos={:?}", | |
665 | hi, | |
666 | source_file.original_start_pos, | |
667 | source_file.original_end_pos | |
668 | ); | |
ff7c6d11 | 669 | |
dfeec247 XL |
670 | let lo = |
671 | (lo + source_file.translated_source_file.start_pos) - source_file.original_start_pos; | |
672 | let hi = | |
673 | (hi + source_file.translated_source_file.start_pos) - source_file.original_start_pos; | |
9e0c209e | 674 | |
c295e0f8 | 675 | // Do not try to decode parent for foreign spans. |
5099ac24 | 676 | Span::new(lo, hi, ctxt, None) |
e1599b0c XL |
677 | } |
678 | } | |
679 | ||
c295e0f8 | 680 | impl<'a, 'tcx> Decodable<DecodeContext<'a, 'tcx>> for &'tcx [thir::abstract_const::Node<'tcx>] { |
5099ac24 | 681 | fn decode(d: &mut DecodeContext<'a, 'tcx>) -> Self { |
1b1a35ee XL |
682 | ty::codec::RefDecodable::decode(d) |
683 | } | |
684 | } | |
685 | ||
3dfed10e | 686 | impl<'a, 'tcx> Decodable<DecodeContext<'a, 'tcx>> for &'tcx [(ty::Predicate<'tcx>, Span)] { |
5099ac24 | 687 | fn decode(d: &mut DecodeContext<'a, 'tcx>) -> Self { |
3dfed10e XL |
688 | ty::codec::RefDecodable::decode(d) |
689 | } | |
690 | } | |
691 | ||
692 | impl<'a, 'tcx, T: Decodable<DecodeContext<'a, 'tcx>>> Decodable<DecodeContext<'a, 'tcx>> | |
693 | for Lazy<T> | |
694 | { | |
5099ac24 | 695 | fn decode(decoder: &mut DecodeContext<'a, 'tcx>) -> Self { |
3dfed10e | 696 | decoder.read_lazy_with_meta(()) |
2c00a5a8 XL |
697 | } |
698 | } | |
699 | ||
3dfed10e XL |
700 | impl<'a, 'tcx, T: Decodable<DecodeContext<'a, 'tcx>>> Decodable<DecodeContext<'a, 'tcx>> |
701 | for Lazy<[T]> | |
702 | { | |
5099ac24 FG |
703 | fn decode(decoder: &mut DecodeContext<'a, 'tcx>) -> Self { |
704 | let len = decoder.read_usize(); | |
705 | if len == 0 { Lazy::empty() } else { decoder.read_lazy_with_meta(len) } | |
3dfed10e XL |
706 | } |
707 | } | |
708 | ||
709 | impl<'a, 'tcx, I: Idx, T: Decodable<DecodeContext<'a, 'tcx>>> Decodable<DecodeContext<'a, 'tcx>> | |
710 | for Lazy<Table<I, T>> | |
f035d41b | 711 | where |
3dfed10e | 712 | Option<T>: FixedSizeEncoding, |
dfeec247 | 713 | { |
5099ac24 FG |
714 | fn decode(decoder: &mut DecodeContext<'a, 'tcx>) -> Self { |
715 | let len = decoder.read_usize(); | |
3dfed10e | 716 | decoder.read_lazy_with_meta(len) |
ff7c6d11 XL |
717 | } |
718 | } | |
719 | ||
dfeec247 | 720 | implement_ty_decoder!(DecodeContext<'a, 'tcx>); |
ea8adc8c | 721 | |
a2a8927a | 722 | impl<'tcx> MetadataBlob { |
60c5eb7d | 723 | crate fn new(metadata_ref: MetadataRef) -> MetadataBlob { |
c295e0f8 | 724 | MetadataBlob(Lrc::new(metadata_ref)) |
60c5eb7d XL |
725 | } |
726 | ||
e74abb32 | 727 | crate fn is_compatible(&self) -> bool { |
c295e0f8 | 728 | self.blob().starts_with(METADATA_HEADER) |
85aaf69f | 729 | } |
85aaf69f | 730 | |
e74abb32 | 731 | crate fn get_rustc_version(&self) -> String { |
dfeec247 XL |
732 | Lazy::<String>::from_position(NonZeroUsize::new(METADATA_HEADER.len() + 4).unwrap()) |
733 | .decode(self) | |
476ff2be SL |
734 | } |
735 | ||
e74abb32 | 736 | crate fn get_root(&self) -> CrateRoot<'tcx> { |
c295e0f8 | 737 | let slice = &self.blob()[..]; |
9e0c209e | 738 | let offset = METADATA_HEADER.len(); |
dfeec247 XL |
739 | let pos = (((slice[offset + 0] as u32) << 24) |
740 | | ((slice[offset + 1] as u32) << 16) | |
741 | | ((slice[offset + 2] as u32) << 8) | |
742 | | ((slice[offset + 3] as u32) << 0)) as usize; | |
743 | Lazy::<CrateRoot<'tcx>>::from_position(NonZeroUsize::new(pos).unwrap()).decode(self) | |
9e0c209e SL |
744 | } |
745 | ||
dfeec247 | 746 | crate fn list_crate_metadata(&self, out: &mut dyn io::Write) -> io::Result<()> { |
9e0c209e | 747 | let root = self.get_root(); |
136023e0 XL |
748 | writeln!(out, "Crate info:")?; |
749 | writeln!(out, "name {}{}", root.name, root.extra_filename)?; | |
750 | writeln!(out, "hash {} stable_crate_id {:?}", root.hash, root.stable_crate_id)?; | |
751 | writeln!(out, "proc_macro {:?}", root.proc_macro_data.is_some())?; | |
752 | writeln!(out, "=External Dependencies=")?; | |
dfeec247 | 753 | for (i, dep) in root.crate_deps.decode(self).enumerate() { |
136023e0 XL |
754 | writeln!( |
755 | out, | |
756 | "{} {}{} hash {} host_hash {:?} kind {:?}", | |
757 | i + 1, | |
758 | dep.name, | |
759 | dep.extra_filename, | |
760 | dep.hash, | |
761 | dep.host_hash, | |
762 | dep.kind | |
763 | )?; | |
1a4d82fc | 764 | } |
9e0c209e SL |
765 | write!(out, "\n")?; |
766 | Ok(()) | |
970d7e83 | 767 | } |
223e47cc LB |
768 | } |
769 | ||
60c5eb7d | 770 | impl CrateRoot<'_> { |
e74abb32 | 771 | crate fn is_proc_macro_crate(&self) -> bool { |
60c5eb7d XL |
772 | self.proc_macro_data.is_some() |
773 | } | |
774 | ||
775 | crate fn name(&self) -> Symbol { | |
776 | self.name | |
777 | } | |
778 | ||
60c5eb7d XL |
779 | crate fn hash(&self) -> Svh { |
780 | self.hash | |
781 | } | |
782 | ||
6a06907d XL |
783 | crate fn stable_crate_id(&self) -> StableCrateId { |
784 | self.stable_crate_id | |
785 | } | |
786 | ||
60c5eb7d XL |
787 | crate fn triple(&self) -> &TargetTriple { |
788 | &self.triple | |
789 | } | |
790 | ||
a2a8927a | 791 | crate fn decode_crate_deps<'a>( |
60c5eb7d XL |
792 | &self, |
793 | metadata: &'a MetadataBlob, | |
794 | ) -> impl ExactSizeIterator<Item = CrateDep> + Captures<'a> { | |
795 | self.crate_deps.decode(metadata) | |
796 | } | |
797 | } | |
798 | ||
74b04a01 | 799 | impl<'a, 'tcx> CrateMetadataRef<'a> { |
5099ac24 | 800 | fn raw_proc_macro(self, id: DefIndex) -> &'a ProcMacro { |
e1599b0c XL |
801 | // DefIndex's in root.proc_macro_data have a one-to-one correspondence |
802 | // with items in 'raw_proc_macros'. | |
1b1a35ee XL |
803 | let pos = self |
804 | .root | |
805 | .proc_macro_data | |
806 | .as_ref() | |
807 | .unwrap() | |
808 | .macros | |
809 | .decode(self) | |
810 | .position(|i| i == id) | |
811 | .unwrap(); | |
e1599b0c XL |
812 | &self.raw_proc_macros.unwrap()[pos] |
813 | } | |
814 | ||
5e7ed085 FG |
815 | fn opt_item_name(self, item_index: DefIndex) -> Option<Symbol> { |
816 | self.def_key(item_index).disambiguated_data.data.get_opt_name() | |
817 | } | |
818 | ||
819 | fn item_name(self, item_index: DefIndex) -> Symbol { | |
820 | self.opt_item_name(item_index).expect("no encoded ident for item") | |
821 | } | |
822 | ||
5099ac24 | 823 | fn opt_item_ident(self, item_index: DefIndex, sess: &Session) -> Option<Ident> { |
5e7ed085 FG |
824 | let name = self.opt_item_name(item_index)?; |
825 | let span = match self.root.tables.def_ident_span.get(self, item_index) { | |
a2a8927a XL |
826 | Some(lazy_span) => lazy_span.decode((self, sess)), |
827 | None => { | |
828 | // FIXME: this weird case of a name with no span is specific to `extern crate` | |
829 | // items, which are supposed to be treated like `use` items and only be encoded | |
830 | // to metadata as `Export`s, return `None` because that's what all the callers | |
831 | // expect in this case. | |
832 | assert_eq!(self.def_kind(item_index), DefKind::ExternCrate); | |
833 | return None; | |
834 | } | |
835 | }; | |
836 | Some(Ident::new(name, span)) | |
223e47cc | 837 | } |
223e47cc | 838 | |
5099ac24 | 839 | fn item_ident(self, item_index: DefIndex, sess: &Session) -> Ident { |
a2a8927a | 840 | self.opt_item_ident(item_index, sess).expect("no encoded ident for item") |
5869c6ff XL |
841 | } |
842 | ||
5099ac24 | 843 | fn maybe_kind(self, item_id: DefIndex) -> Option<EntryKind> { |
5869c6ff XL |
844 | self.root.tables.kind.get(self, item_id).map(|k| k.decode(self)) |
845 | } | |
846 | ||
5099ac24 | 847 | fn kind(self, item_id: DefIndex) -> EntryKind { |
5869c6ff XL |
848 | self.maybe_kind(item_id).unwrap_or_else(|| { |
849 | bug!( | |
850 | "CrateMetadata::kind({:?}): id not found, in crate {:?} with number {}", | |
851 | item_id, | |
852 | self.root.name, | |
853 | self.cnum, | |
854 | ) | |
855 | }) | |
856 | } | |
857 | ||
5099ac24 | 858 | fn def_kind(self, item_id: DefIndex) -> DefKind { |
5e7ed085 FG |
859 | self.root.tables.opt_def_kind.get(self, item_id).map(|k| k.decode(self)).unwrap_or_else( |
860 | || { | |
861 | bug!( | |
862 | "CrateMetadata::def_kind({:?}): id not found, in crate {:?} with number {}", | |
863 | item_id, | |
864 | self.root.name, | |
865 | self.cnum, | |
866 | ) | |
867 | }, | |
868 | ) | |
476ff2be SL |
869 | } |
870 | ||
5099ac24 | 871 | fn get_span(self, index: DefIndex, sess: &Session) -> Span { |
1b1a35ee XL |
872 | self.root |
873 | .tables | |
5e7ed085 | 874 | .def_span |
1b1a35ee XL |
875 | .get(self, index) |
876 | .unwrap_or_else(|| panic!("Missing span for {:?}", index)) | |
877 | .decode((self, sess)) | |
e1599b0c XL |
878 | } |
879 | ||
5099ac24 | 880 | fn load_proc_macro(self, id: DefIndex, sess: &Session) -> SyntaxExtension { |
136023e0 | 881 | let (name, kind, helper_attrs) = match *self.raw_proc_macro(id) { |
e1599b0c XL |
882 | ProcMacro::CustomDerive { trait_name, attributes, client } => { |
883 | let helper_attrs = | |
884 | attributes.iter().cloned().map(Symbol::intern).collect::<Vec<_>>(); | |
885 | ( | |
886 | trait_name, | |
136023e0 | 887 | SyntaxExtensionKind::Derive(Box::new(ProcMacroDerive { client })), |
e1599b0c XL |
888 | helper_attrs, |
889 | ) | |
890 | } | |
136023e0 XL |
891 | ProcMacro::Attr { name, client } => { |
892 | (name, SyntaxExtensionKind::Attr(Box::new(AttrProcMacro { client })), Vec::new()) | |
893 | } | |
894 | ProcMacro::Bang { name, client } => { | |
895 | (name, SyntaxExtensionKind::Bang(Box::new(BangProcMacro { client })), Vec::new()) | |
896 | } | |
e1599b0c | 897 | }; |
e1599b0c | 898 | |
136023e0 | 899 | let attrs: Vec<_> = self.get_item_attrs(id, sess).collect(); |
e1599b0c | 900 | SyntaxExtension::new( |
3dfed10e | 901 | sess, |
e1599b0c | 902 | kind, |
136023e0 | 903 | self.get_span(id, sess), |
e1599b0c | 904 | helper_attrs, |
e74abb32 | 905 | self.root.edition, |
e1599b0c | 906 | Symbol::intern(name), |
fc512014 | 907 | &attrs, |
e1599b0c | 908 | ) |
7453a54e SL |
909 | } |
910 | ||
5e7ed085 | 911 | fn get_variant(self, kind: &EntryKind, index: DefIndex, parent_did: DefId) -> ty::VariantDef { |
e74abb32 | 912 | let data = match kind { |
5e7ed085 | 913 | EntryKind::Variant(data) | EntryKind::Struct(data) | EntryKind::Union(data) => { |
dfeec247 XL |
914 | data.decode(self) |
915 | } | |
c30ab7b3 | 916 | _ => bug!(), |
9cc50fc6 | 917 | }; |
9cc50fc6 | 918 | |
e74abb32 XL |
919 | let adt_kind = match kind { |
920 | EntryKind::Variant(_) => ty::AdtKind::Enum, | |
921 | EntryKind::Struct(..) => ty::AdtKind::Struct, | |
922 | EntryKind::Union(..) => ty::AdtKind::Union, | |
923 | _ => bug!(), | |
924 | }; | |
925 | ||
dfeec247 XL |
926 | let variant_did = |
927 | if adt_kind == ty::AdtKind::Enum { Some(self.local_def_id(index)) } else { None }; | |
532ac7d7 | 928 | let ctor_did = data.ctor.map(|index| self.local_def_id(index)); |
0bf4aa26 | 929 | |
b7449926 | 930 | ty::VariantDef::new( |
5e7ed085 | 931 | self.item_name(index), |
532ac7d7 XL |
932 | variant_did, |
933 | ctor_did, | |
b7449926 | 934 | data.discr, |
dfeec247 | 935 | self.root |
ba9703b0 | 936 | .tables |
dfeec247 XL |
937 | .children |
938 | .get(self, index) | |
29967ef6 | 939 | .unwrap_or_else(Lazy::empty) |
dfeec247 XL |
940 | .decode(self) |
941 | .map(|index| ty::FieldDef { | |
476ff2be | 942 | did: self.local_def_id(index), |
5e7ed085 | 943 | name: self.item_name(index), |
e74abb32 | 944 | vis: self.get_visibility(index), |
dfeec247 XL |
945 | }) |
946 | .collect(), | |
0bf4aa26 | 947 | data.ctor_kind, |
532ac7d7 XL |
948 | adt_kind, |
949 | parent_did, | |
950 | false, | |
3dfed10e | 951 | data.is_non_exhaustive, |
b7449926 | 952 | ) |
c30ab7b3 SL |
953 | } |
954 | ||
5e7ed085 | 955 | fn get_adt_def(self, item_id: DefIndex, tcx: TyCtxt<'tcx>) -> ty::AdtDef<'tcx> { |
e74abb32 | 956 | let kind = self.kind(item_id); |
9e0c209e | 957 | let did = self.local_def_id(item_id); |
94b46f34 | 958 | |
5e7ed085 FG |
959 | let adt_kind = match kind { |
960 | EntryKind::Enum => ty::AdtKind::Enum, | |
961 | EntryKind::Struct(_) => ty::AdtKind::Struct, | |
962 | EntryKind::Union(_) => ty::AdtKind::Union, | |
8bb4bdeb XL |
963 | _ => bug!("get_adt_def called on a non-ADT {:?}", did), |
964 | }; | |
5e7ed085 | 965 | let repr = self.root.tables.repr_options.get(self, item_id).unwrap().decode(self); |
94b46f34 | 966 | |
e74abb32 | 967 | let variants = if let ty::AdtKind::Enum = adt_kind { |
dfeec247 | 968 | self.root |
ba9703b0 | 969 | .tables |
dfeec247 XL |
970 | .children |
971 | .get(self, item_id) | |
29967ef6 | 972 | .unwrap_or_else(Lazy::empty) |
c30ab7b3 | 973 | .decode(self) |
5e7ed085 | 974 | .map(|index| self.get_variant(&self.kind(index), index, did)) |
c30ab7b3 SL |
975 | .collect() |
976 | } else { | |
5e7ed085 | 977 | std::iter::once(self.get_variant(&kind, item_id, did)).collect() |
9e0c209e | 978 | }; |
9cc50fc6 | 979 | |
e74abb32 | 980 | tcx.alloc_adt_def(did, adt_kind, variants, repr) |
9cc50fc6 SL |
981 | } |
982 | ||
5099ac24 | 983 | fn get_generics(self, item_id: DefIndex, sess: &Session) -> ty::Generics { |
5e7ed085 | 984 | self.root.tables.generics_of.get(self, item_id).unwrap().decode((self, sess)) |
9e0c209e | 985 | } |
1a4d82fc | 986 | |
5099ac24 | 987 | fn get_visibility(self, id: DefIndex) -> ty::Visibility { |
fc512014 | 988 | self.root.tables.visibility.get(self, id).unwrap().decode(self) |
9e0c209e | 989 | } |
1a4d82fc | 990 | |
5099ac24 FG |
991 | fn get_trait_item_def_id(self, id: DefIndex) -> Option<DefId> { |
992 | self.root.tables.trait_item_def_id.get(self, id).map(|d| d.decode(self)) | |
993 | } | |
994 | ||
5099ac24 | 995 | fn get_expn_that_defined(self, id: DefIndex, sess: &Session) -> ExpnId { |
29967ef6 XL |
996 | self.root.tables.expn_that_defined.get(self, id).unwrap().decode((self, sess)) |
997 | } | |
998 | ||
b7449926 | 999 | /// Iterates over all the stability attributes in the given crate. |
5099ac24 | 1000 | fn get_lib_features(self, tcx: TyCtxt<'tcx>) -> &'tcx [(Symbol, Option<Symbol>)] { |
dfeec247 | 1001 | tcx.arena.alloc_from_iter(self.root.lib_features.decode(self)) |
9e0c209e | 1002 | } |
223e47cc | 1003 | |
b7449926 | 1004 | /// Iterates over the language items in the given crate. |
5e7ed085 FG |
1005 | fn get_lang_items(self, tcx: TyCtxt<'tcx>) -> &'tcx [(DefId, usize)] { |
1006 | tcx.arena.alloc_from_iter( | |
1007 | self.root | |
1008 | .lang_items | |
1009 | .decode(self) | |
1010 | .map(move |(def_index, index)| (self.local_def_id(def_index), index)), | |
1011 | ) | |
b7449926 XL |
1012 | } |
1013 | ||
e1599b0c | 1014 | /// Iterates over the diagnostic items in the given crate. |
5099ac24 FG |
1015 | fn get_diagnostic_items(self) -> DiagnosticItems { |
1016 | let mut id_to_name = FxHashMap::default(); | |
1017 | let name_to_id = self | |
1018 | .root | |
1019 | .diagnostic_items | |
1020 | .decode(self) | |
1021 | .map(|(name, def_index)| { | |
1022 | let id = self.local_def_id(def_index); | |
1023 | id_to_name.insert(id, name); | |
1024 | (name, id) | |
1025 | }) | |
1026 | .collect(); | |
1027 | DiagnosticItems { id_to_name, name_to_id } | |
e1599b0c XL |
1028 | } |
1029 | ||
5099ac24 FG |
1030 | /// Iterates over all named children of the given module, |
1031 | /// including both proper items and reexports. | |
1032 | /// Module here is understood in name resolution sense - it can be a `mod` item, | |
1033 | /// or a crate root, or an enum, or a trait. | |
1034 | fn for_each_module_child( | |
1035 | self, | |
1036 | id: DefIndex, | |
1037 | mut callback: impl FnMut(ModChild), | |
1038 | sess: &Session, | |
1039 | ) { | |
1b1a35ee | 1040 | if let Some(data) = &self.root.proc_macro_data { |
5099ac24 FG |
1041 | // If we are loading as a proc macro, we want to return |
1042 | // the view of this crate as a proc macro crate. | |
476ff2be | 1043 | if id == CRATE_DEF_INDEX { |
5099ac24 | 1044 | for def_index in data.macros.decode(self) { |
e1599b0c | 1045 | let raw_macro = self.raw_proc_macro(def_index); |
48663c56 | 1046 | let res = Res::Def( |
e1599b0c XL |
1047 | DefKind::Macro(macro_kind(raw_macro)), |
1048 | self.local_def_id(def_index), | |
8bb4bdeb | 1049 | ); |
f035d41b | 1050 | let ident = self.item_ident(def_index, sess); |
5099ac24 FG |
1051 | callback(ModChild { |
1052 | ident, | |
1053 | res, | |
1054 | vis: ty::Visibility::Public, | |
1055 | span: ident.span, | |
5e7ed085 | 1056 | macro_rules: false, |
5099ac24 | 1057 | }); |
476ff2be SL |
1058 | } |
1059 | } | |
dfeec247 | 1060 | return; |
476ff2be SL |
1061 | } |
1062 | ||
9e0c209e | 1063 | // Iterate over all children. |
a2a8927a | 1064 | if let Some(children) = self.root.tables.children.get(self, id) { |
5869c6ff | 1065 | for child_index in children.decode((self, sess)) { |
a2a8927a XL |
1066 | if let Some(ident) = self.opt_item_ident(child_index, sess) { |
1067 | let kind = self.def_kind(child_index); | |
48663c56 XL |
1068 | let def_id = self.local_def_id(child_index); |
1069 | let res = Res::Def(kind, def_id); | |
a2a8927a XL |
1070 | let vis = self.get_visibility(child_index); |
1071 | let span = self.get_span(child_index, sess); | |
5e7ed085 FG |
1072 | let macro_rules = match kind { |
1073 | DefKind::Macro(..) => match self.kind(child_index) { | |
1074 | EntryKind::MacroDef(_, macro_rules) => macro_rules, | |
1075 | _ => unreachable!(), | |
1076 | }, | |
1077 | _ => false, | |
1078 | }; | |
94222f64 | 1079 | |
5e7ed085 | 1080 | callback(ModChild { ident, res, vis, span, macro_rules }); |
94222f64 | 1081 | |
2c00a5a8 XL |
1082 | // For non-re-export structs and variants add their constructors to children. |
1083 | // Re-export lists automatically contain constructors when necessary. | |
48663c56 XL |
1084 | match kind { |
1085 | DefKind::Struct => { | |
a2a8927a XL |
1086 | if let Some((ctor_def_id, ctor_kind)) = |
1087 | self.get_ctor_def_id_and_kind(child_index) | |
1088 | { | |
dfeec247 XL |
1089 | let ctor_res = |
1090 | Res::Def(DefKind::Ctor(CtorOf::Struct, ctor_kind), ctor_def_id); | |
532ac7d7 | 1091 | let vis = self.get_visibility(ctor_def_id.index); |
5e7ed085 FG |
1092 | callback(ModChild { |
1093 | ident, | |
1094 | res: ctor_res, | |
1095 | vis, | |
1096 | span, | |
1097 | macro_rules: false, | |
1098 | }); | |
c30ab7b3 SL |
1099 | } |
1100 | } | |
48663c56 | 1101 | DefKind::Variant => { |
c30ab7b3 SL |
1102 | // Braced variants, unlike structs, generate unusable names in |
1103 | // value namespace, they are reserved for possible future use. | |
532ac7d7 XL |
1104 | // It's ok to use the variant's id as a ctor id since an |
1105 | // error will be reported on any use of such resolution anyway. | |
a2a8927a XL |
1106 | let (ctor_def_id, ctor_kind) = self |
1107 | .get_ctor_def_id_and_kind(child_index) | |
1108 | .unwrap_or((def_id, CtorKind::Fictive)); | |
dfeec247 XL |
1109 | let ctor_res = |
1110 | Res::Def(DefKind::Ctor(CtorOf::Variant, ctor_kind), ctor_def_id); | |
48663c56 | 1111 | let mut vis = self.get_visibility(ctor_def_id.index); |
3c0e092e | 1112 | if ctor_def_id == def_id && vis.is_public() { |
48663c56 XL |
1113 | // For non-exhaustive variants lower the constructor visibility to |
1114 | // within the crate. We only need this for fictive constructors, | |
1115 | // for other constructors correct visibilities | |
1116 | // were already encoded in metadata. | |
5869c6ff XL |
1117 | let mut attrs = self.get_item_attrs(def_id.index, sess); |
1118 | if attrs.any(|item| item.has_name(sym::non_exhaustive)) { | |
48663c56 XL |
1119 | let crate_def_id = self.local_def_id(CRATE_DEF_INDEX); |
1120 | vis = ty::Visibility::Restricted(crate_def_id); | |
1121 | } | |
1122 | } | |
5e7ed085 FG |
1123 | callback(ModChild { |
1124 | ident, | |
1125 | res: ctor_res, | |
1126 | vis, | |
1127 | span, | |
1128 | macro_rules: false, | |
1129 | }); | |
c30ab7b3 SL |
1130 | } |
1131 | _ => {} | |
1132 | } | |
d9579d0f AL |
1133 | } |
1134 | } | |
9e0c209e | 1135 | } |
7453a54e | 1136 | |
5099ac24 FG |
1137 | match self.kind(id) { |
1138 | EntryKind::Mod(exports) => { | |
1139 | for exp in exports.decode((self, sess)) { | |
1140 | callback(exp); | |
1141 | } | |
9e0c209e | 1142 | } |
5e7ed085 | 1143 | EntryKind::Enum | EntryKind::Trait => {} |
5099ac24 | 1144 | _ => bug!("`for_each_module_child` is called on a non-module: {:?}", self.def_kind(id)), |
9e0c209e SL |
1145 | } |
1146 | } | |
1a4d82fc | 1147 | |
5099ac24 | 1148 | fn is_ctfe_mir_available(self, id: DefIndex) -> bool { |
5869c6ff XL |
1149 | self.root.tables.mir_for_ctfe.get(self, id).is_some() |
1150 | } | |
1151 | ||
5099ac24 | 1152 | fn is_item_mir_available(self, id: DefIndex) -> bool { |
5e7ed085 | 1153 | self.root.tables.optimized_mir.get(self, id).is_some() |
9e0c209e | 1154 | } |
1a4d82fc | 1155 | |
5099ac24 | 1156 | fn module_expansion(self, id: DefIndex, sess: &Session) -> ExpnId { |
3c0e092e | 1157 | match self.kind(id) { |
5e7ed085 | 1158 | EntryKind::Mod(_) | EntryKind::Enum | EntryKind::Trait => { |
3c0e092e XL |
1159 | self.get_expn_that_defined(id, sess) |
1160 | } | |
1161 | _ => panic!("Expected module, found {:?}", self.local_def_id(id)), | |
3dfed10e XL |
1162 | } |
1163 | } | |
1164 | ||
5099ac24 | 1165 | fn get_fn_has_self_parameter(self, id: DefIndex) -> bool { |
a2a8927a XL |
1166 | match self.kind(id) { |
1167 | EntryKind::AssocFn(data) => data.decode(self).has_self, | |
1168 | _ => false, | |
1169 | } | |
1170 | } | |
1171 | ||
5099ac24 FG |
1172 | fn get_associated_item_def_ids(self, tcx: TyCtxt<'tcx>, id: DefIndex) -> &'tcx [DefId] { |
1173 | if let Some(children) = self.root.tables.children.get(self, id) { | |
1174 | tcx.arena.alloc_from_iter( | |
1175 | children.decode((self, tcx.sess)).map(|child_index| self.local_def_id(child_index)), | |
1176 | ) | |
1177 | } else { | |
1178 | &[] | |
1179 | } | |
1180 | } | |
1181 | ||
5e7ed085 | 1182 | fn get_associated_item(self, id: DefIndex) -> ty::AssocItem { |
8bb4bdeb XL |
1183 | let def_key = self.def_key(id); |
1184 | let parent = self.local_def_id(def_key.parent.unwrap()); | |
5e7ed085 | 1185 | let name = self.item_name(id); |
223e47cc | 1186 | |
e74abb32 | 1187 | let (kind, container, has_self) = match self.kind(id) { |
5e7ed085 | 1188 | EntryKind::AssocConst(container) => (ty::AssocKind::Const, container, false), |
ba9703b0 | 1189 | EntryKind::AssocFn(data) => { |
9e0c209e | 1190 | let data = data.decode(self); |
ba9703b0 | 1191 | (ty::AssocKind::Fn, data.container, data.has_self) |
9e0c209e | 1192 | } |
dfeec247 | 1193 | EntryKind::AssocType(container) => (ty::AssocKind::Type, container, false), |
dfeec247 | 1194 | _ => bug!("cannot get associated-item of `{:?}`", def_key), |
8bb4bdeb XL |
1195 | }; |
1196 | ||
dc9dc135 | 1197 | ty::AssocItem { |
5e7ed085 | 1198 | name, |
3b2f2976 | 1199 | kind, |
e74abb32 | 1200 | vis: self.get_visibility(id), |
8bb4bdeb XL |
1201 | defaultness: container.defaultness(), |
1202 | def_id: self.local_def_id(id), | |
5099ac24 | 1203 | trait_item_def_id: self.get_trait_item_def_id(id), |
8bb4bdeb | 1204 | container: container.with_def_id(parent), |
ba9703b0 | 1205 | fn_has_self_parameter: has_self, |
8bb4bdeb | 1206 | } |
9e0c209e | 1207 | } |
223e47cc | 1208 | |
5099ac24 | 1209 | fn get_ctor_def_id_and_kind(self, node_id: DefIndex) -> Option<(DefId, CtorKind)> { |
e74abb32 | 1210 | match self.kind(node_id) { |
5e7ed085 | 1211 | EntryKind::Struct(data) | EntryKind::Variant(data) => { |
a2a8927a XL |
1212 | let vdata = data.decode(self); |
1213 | vdata.ctor.map(|index| (self.local_def_id(index), vdata.ctor_kind)) | |
9e0c209e | 1214 | } |
c30ab7b3 | 1215 | _ => None, |
9e0c209e | 1216 | } |
223e47cc LB |
1217 | } |
1218 | ||
fc512014 | 1219 | fn get_item_attrs( |
5099ac24 | 1220 | self, |
a2a8927a | 1221 | id: DefIndex, |
fc512014 XL |
1222 | sess: &'a Session, |
1223 | ) -> impl Iterator<Item = ast::Attribute> + 'a { | |
ba9703b0 XL |
1224 | self.root |
1225 | .tables | |
1226 | .attributes | |
a2a8927a XL |
1227 | .get(self, id) |
1228 | .unwrap_or_else(|| { | |
1229 | // Structure and variant constructors don't have any attributes encoded for them, | |
1230 | // but we assume that someone passing a constructor ID actually wants to look at | |
1231 | // the attributes on the corresponding struct or variant. | |
1232 | let def_key = self.def_key(id); | |
1233 | assert_eq!(def_key.disambiguated_data.data, DefPathData::Ctor); | |
1234 | let parent_id = def_key.parent.expect("no parent for a constructor"); | |
1235 | self.root | |
1236 | .tables | |
1237 | .attributes | |
1238 | .get(self, parent_id) | |
1239 | .expect("no encoded attributes for a structure or variant") | |
1240 | }) | |
ba9703b0 | 1241 | .decode((self, sess)) |
9e0c209e | 1242 | } |
223e47cc | 1243 | |
5099ac24 FG |
1244 | fn get_struct_field_names( |
1245 | self, | |
1246 | id: DefIndex, | |
1247 | sess: &'a Session, | |
1248 | ) -> impl Iterator<Item = Spanned<Symbol>> + 'a { | |
dfeec247 | 1249 | self.root |
ba9703b0 | 1250 | .tables |
dfeec247 XL |
1251 | .children |
1252 | .get(self, id) | |
29967ef6 | 1253 | .unwrap_or_else(Lazy::empty) |
c30ab7b3 | 1254 | .decode(self) |
5e7ed085 | 1255 | .map(move |index| respan(self.get_span(index, sess), self.item_name(index))) |
9e0c209e | 1256 | } |
223e47cc | 1257 | |
5099ac24 | 1258 | fn get_struct_field_visibilities(self, id: DefIndex) -> impl Iterator<Item = Visibility> + 'a { |
17df50a5 XL |
1259 | self.root |
1260 | .tables | |
1261 | .children | |
1262 | .get(self, id) | |
1263 | .unwrap_or_else(Lazy::empty) | |
1264 | .decode(self) | |
5099ac24 | 1265 | .map(move |field_index| self.get_visibility(field_index)) |
17df50a5 XL |
1266 | } |
1267 | ||
60c5eb7d | 1268 | fn get_inherent_implementations_for_type( |
5099ac24 | 1269 | self, |
dc9dc135 XL |
1270 | tcx: TyCtxt<'tcx>, |
1271 | id: DefIndex, | |
1272 | ) -> &'tcx [DefId] { | |
e74abb32 | 1273 | tcx.arena.alloc_from_iter( |
dfeec247 | 1274 | self.root |
ba9703b0 | 1275 | .tables |
dfeec247 XL |
1276 | .inherent_impls |
1277 | .get(self, id) | |
29967ef6 | 1278 | .unwrap_or_else(Lazy::empty) |
e74abb32 | 1279 | .decode(self) |
dfeec247 | 1280 | .map(|index| self.local_def_id(index)), |
e74abb32 | 1281 | ) |
9e0c209e | 1282 | } |
223e47cc | 1283 | |
5099ac24 FG |
1284 | /// Decodes all inherent impls in the crate (for rustdoc). |
1285 | fn get_inherent_impls(self) -> impl Iterator<Item = (DefId, DefId)> + 'a { | |
1286 | (0..self.root.tables.inherent_impls.size()).flat_map(move |i| { | |
1287 | let ty_index = DefIndex::from_usize(i); | |
1288 | let ty_def_id = self.local_def_id(ty_index); | |
1289 | self.root | |
1290 | .tables | |
1291 | .inherent_impls | |
1292 | .get(self, ty_index) | |
1293 | .unwrap_or_else(Lazy::empty) | |
1294 | .decode(self) | |
1295 | .map(move |impl_index| (ty_def_id, self.local_def_id(impl_index))) | |
1296 | }) | |
a2a8927a XL |
1297 | } |
1298 | ||
5099ac24 FG |
1299 | /// Decodes all traits in the crate (for rustdoc and rustc diagnostics). |
1300 | fn get_traits(self) -> impl Iterator<Item = DefId> + 'a { | |
1301 | self.root.traits.decode(self).map(move |index| self.local_def_id(index)) | |
1302 | } | |
1303 | ||
1304 | /// Decodes all trait impls in the crate (for rustdoc). | |
1305 | fn get_trait_impls(self) -> impl Iterator<Item = (DefId, DefId, Option<SimplifiedType>)> + 'a { | |
5e7ed085 | 1306 | self.cdata.trait_impls.iter().flat_map(move |(&(trait_cnum_raw, trait_index), impls)| { |
5099ac24 | 1307 | let trait_def_id = DefId { |
5e7ed085 FG |
1308 | krate: self.cnum_map[CrateNum::from_u32(trait_cnum_raw)], |
1309 | index: trait_index, | |
5099ac24 FG |
1310 | }; |
1311 | impls.decode(self).map(move |(impl_index, simplified_self_ty)| { | |
1312 | (trait_def_id, self.local_def_id(impl_index), simplified_self_ty) | |
1313 | }) | |
a2a8927a XL |
1314 | }) |
1315 | } | |
1316 | ||
5e7ed085 FG |
1317 | fn get_all_incoherent_impls(self) -> impl Iterator<Item = DefId> + 'a { |
1318 | self.cdata | |
1319 | .incoherent_impls | |
1320 | .values() | |
1321 | .flat_map(move |impls| impls.decode(self).map(move |idx| self.local_def_id(idx))) | |
1322 | } | |
1323 | ||
1324 | fn get_incoherent_impls(self, tcx: TyCtxt<'tcx>, simp: SimplifiedType) -> &'tcx [DefId] { | |
1325 | if let Some(impls) = self.cdata.incoherent_impls.get(&simp) { | |
1326 | tcx.arena.alloc_from_iter(impls.decode(self).map(|idx| self.local_def_id(idx))) | |
1327 | } else { | |
1328 | &[] | |
1329 | } | |
1330 | } | |
1331 | ||
a2a8927a | 1332 | fn get_implementations_of_trait( |
5099ac24 | 1333 | self, |
dc9dc135 | 1334 | tcx: TyCtxt<'tcx>, |
a2a8927a XL |
1335 | trait_def_id: DefId, |
1336 | ) -> &'tcx [(DefId, Option<SimplifiedType>)] { | |
5099ac24 | 1337 | if self.trait_impls.is_empty() { |
dfeec247 | 1338 | return &[]; |
b7449926 XL |
1339 | } |
1340 | ||
a2a8927a XL |
1341 | // Do a reverse lookup beforehand to avoid touching the crate_num |
1342 | // hash map in the loop below. | |
1343 | let key = match self.reverse_translate_def_id(trait_def_id) { | |
1344 | Some(def_id) => (def_id.krate.as_u32(), def_id.index), | |
1345 | None => return &[], | |
1346 | }; | |
223e47cc | 1347 | |
a2a8927a XL |
1348 | if let Some(impls) = self.trait_impls.get(&key) { |
1349 | tcx.arena.alloc_from_iter( | |
3dfed10e XL |
1350 | impls |
1351 | .decode(self) | |
a2a8927a XL |
1352 | .map(|(idx, simplified_self_ty)| (self.local_def_id(idx), simplified_self_ty)), |
1353 | ) | |
1354 | } else { | |
1355 | &[] | |
9e0c209e SL |
1356 | } |
1357 | } | |
223e47cc | 1358 | |
5099ac24 | 1359 | fn get_trait_of_item(self, id: DefIndex) -> Option<DefId> { |
83c7162d XL |
1360 | let def_key = self.def_key(id); |
1361 | match def_key.disambiguated_data.data { | |
1362 | DefPathData::TypeNs(..) | DefPathData::ValueNs(..) => (), | |
1363 | // Not an associated item | |
1364 | _ => return None, | |
1365 | } | |
dfeec247 | 1366 | def_key.parent.and_then(|parent_index| match self.kind(parent_index) { |
5e7ed085 | 1367 | EntryKind::Trait | EntryKind::TraitAlias => Some(self.local_def_id(parent_index)), |
dfeec247 | 1368 | _ => None, |
9e0c209e SL |
1369 | }) |
1370 | } | |
223e47cc | 1371 | |
5099ac24 FG |
1372 | fn get_native_libraries(self, sess: &'a Session) -> impl Iterator<Item = NativeLib> + 'a { |
1373 | self.root.native_libraries.decode((self, sess)) | |
223e47cc LB |
1374 | } |
1375 | ||
5099ac24 | 1376 | fn get_proc_macro_quoted_span(self, index: usize, sess: &Session) -> Span { |
17df50a5 XL |
1377 | self.root |
1378 | .tables | |
1379 | .proc_macro_quoted_spans | |
1380 | .get(self, index) | |
1381 | .unwrap_or_else(|| panic!("Missing proc macro quoted span: {:?}", index)) | |
1382 | .decode((self, sess)) | |
1383 | } | |
1384 | ||
5099ac24 FG |
1385 | fn get_foreign_modules(self, sess: &'a Session) -> impl Iterator<Item = ForeignModule> + '_ { |
1386 | self.root.foreign_modules.decode((self, sess)) | |
0531ce1d XL |
1387 | } |
1388 | ||
60c5eb7d | 1389 | fn get_dylib_dependency_formats( |
5099ac24 | 1390 | self, |
dc9dc135 XL |
1391 | tcx: TyCtxt<'tcx>, |
1392 | ) -> &'tcx [(CrateNum, LinkagePreference)] { | |
dfeec247 XL |
1393 | tcx.arena.alloc_from_iter( |
1394 | self.root.dylib_dependency_formats.decode(self).enumerate().flat_map(|(i, link)| { | |
c30ab7b3 | 1395 | let cnum = CrateNum::new(i + 1); |
94b46f34 | 1396 | link.map(|link| (self.cnum_map[cnum], link)) |
dfeec247 XL |
1397 | }), |
1398 | ) | |
223e47cc | 1399 | } |
223e47cc | 1400 | |
5099ac24 FG |
1401 | fn get_missing_lang_items(self, tcx: TyCtxt<'tcx>) -> &'tcx [lang_items::LangItem] { |
1402 | tcx.arena.alloc_from_iter(self.root.lang_items_missing.decode(self)) | |
d9579d0f AL |
1403 | } |
1404 | ||
60c5eb7d | 1405 | fn exported_symbols( |
5099ac24 | 1406 | self, |
dc9dc135 | 1407 | tcx: TyCtxt<'tcx>, |
ba9703b0 | 1408 | ) -> &'tcx [(ExportedSymbol<'tcx>, SymbolExportLevel)] { |
5099ac24 | 1409 | tcx.arena.alloc_from_iter(self.root.exported_symbols.decode((self, tcx))) |
83c7162d XL |
1410 | } |
1411 | ||
5e7ed085 | 1412 | fn get_macro(self, id: DefIndex, sess: &Session) -> ast::MacroDef { |
e74abb32 | 1413 | match self.kind(id) { |
5e7ed085 FG |
1414 | EntryKind::MacroDef(mac_args, macro_rules) => { |
1415 | ast::MacroDef { body: P(mac_args.decode((self, sess))), macro_rules } | |
1416 | } | |
476ff2be SL |
1417 | _ => bug!(), |
1418 | } | |
9e0c209e | 1419 | } |
9cc50fc6 | 1420 | |
5099ac24 | 1421 | fn is_foreign_item(self, id: DefIndex) -> bool { |
e74abb32 | 1422 | match self.kind(id) { |
5e7ed085 | 1423 | EntryKind::ForeignStatic | EntryKind::ForeignFn => true, |
c30ab7b3 | 1424 | _ => false, |
62682a34 | 1425 | } |
d9579d0f | 1426 | } |
1a4d82fc | 1427 | |
cc61c64b | 1428 | #[inline] |
5099ac24 | 1429 | fn def_key(self, index: DefIndex) -> DefKey { |
fc512014 XL |
1430 | *self |
1431 | .def_key_cache | |
1432 | .lock() | |
1433 | .entry(index) | |
1434 | .or_insert_with(|| self.root.tables.def_keys.get(self, index).unwrap().decode(self)) | |
1435 | } | |
1436 | ||
32a655c1 | 1437 | // Returns the path leading to the thing with this `id`. |
5099ac24 | 1438 | fn def_path(self, id: DefIndex) -> DefPath { |
b7449926 | 1439 | debug!("def_path(cnum={:?}, id={:?})", self.cnum, id); |
e1599b0c | 1440 | DefPath::make(self.cnum, id, |parent| self.def_key(parent)) |
92a42be0 | 1441 | } |
92a42be0 | 1442 | |
3dfed10e | 1443 | fn def_path_hash_unlocked( |
5099ac24 | 1444 | self, |
3dfed10e XL |
1445 | index: DefIndex, |
1446 | def_path_hashes: &mut FxHashMap<DefIndex, DefPathHash>, | |
1447 | ) -> DefPathHash { | |
1448 | *def_path_hashes.entry(index).or_insert_with(|| { | |
1449 | self.root.tables.def_path_hashes.get(self, index).unwrap().decode(self) | |
1450 | }) | |
1451 | } | |
1452 | ||
1453 | #[inline] | |
5099ac24 | 1454 | fn def_path_hash(self, index: DefIndex) -> DefPathHash { |
3dfed10e XL |
1455 | let mut def_path_hashes = self.def_path_hash_cache.lock(); |
1456 | self.def_path_hash_unlocked(index, &mut def_path_hashes) | |
1457 | } | |
1458 | ||
c295e0f8 | 1459 | #[inline] |
5099ac24 | 1460 | fn def_path_hash_to_def_index(self, hash: DefPathHash) -> DefIndex { |
c295e0f8 XL |
1461 | self.def_path_hash_map.def_path_hash_to_def_index(&hash) |
1462 | } | |
1463 | ||
5099ac24 | 1464 | fn expn_hash_to_expn_id(self, sess: &Session, index_guess: u32, hash: ExpnHash) -> ExpnId { |
136023e0 XL |
1465 | debug_assert_eq!(ExpnId::from_hash(hash), None); |
1466 | let index_guess = ExpnIndex::from_u32(index_guess); | |
1467 | let old_hash = self.root.expn_hashes.get(self, index_guess).map(|lazy| lazy.decode(self)); | |
1468 | ||
1469 | let index = if old_hash == Some(hash) { | |
1470 | // Fast path: the expn and its index is unchanged from the | |
1471 | // previous compilation session. There is no need to decode anything | |
1472 | // else. | |
1473 | index_guess | |
1474 | } else { | |
1475 | // Slow path: We need to find out the new `DefIndex` of the provided | |
1476 | // `DefPathHash`, if its still exists. This requires decoding every `DefPathHash` | |
1477 | // stored in this crate. | |
1478 | let map = self.cdata.expn_hash_map.get_or_init(|| { | |
1479 | let end_id = self.root.expn_hashes.size() as u32; | |
1480 | let mut map = | |
1481 | UnhashMap::with_capacity_and_hasher(end_id as usize, Default::default()); | |
1482 | for i in 0..end_id { | |
1483 | let i = ExpnIndex::from_u32(i); | |
1484 | if let Some(hash) = self.root.expn_hashes.get(self, i) { | |
1485 | map.insert(hash.decode(self), i); | |
136023e0 XL |
1486 | } |
1487 | } | |
1488 | map | |
1489 | }); | |
1490 | map[&hash] | |
1491 | }; | |
1492 | ||
c295e0f8 | 1493 | let data = self.root.expn_data.get(self, index).unwrap().decode((self, sess)); |
136023e0 XL |
1494 | rustc_span::hygiene::register_expn_id(self.cnum, index, data, hash) |
1495 | } | |
1496 | ||
b7449926 | 1497 | /// Imports the source_map from an external crate into the source_map of the crate |
9e0c209e SL |
1498 | /// currently being compiled (the "local crate"). |
1499 | /// | |
1500 | /// The import algorithm works analogous to how AST items are inlined from an | |
1501 | /// external crate's metadata: | |
b7449926 XL |
1502 | /// For every SourceFile in the external source_map an 'inline' copy is created in the |
1503 | /// local source_map. The correspondence relation between external and local | |
1504 | /// SourceFiles is recorded in the `ImportedSourceFile` objects returned from this | |
9e0c209e SL |
1505 | /// function. When an item from an external crate is later inlined into this |
1506 | /// crate, this correspondence information is used to translate the span | |
1507 | /// information of the inlined item so that it refers the correct positions in | |
b7449926 | 1508 | /// the local source_map (see `<decoder::DecodeContext as SpecializedDecoder<Span>>`). |
9e0c209e | 1509 | /// |
b7449926 XL |
1510 | /// The import algorithm in the function below will reuse SourceFiles already |
1511 | /// existing in the local source_map. For example, even if the SourceFile of some | |
9e0c209e | 1512 | /// source file of libstd gets imported many times, there will only ever be |
b7449926 | 1513 | /// one SourceFile object for the corresponding file in the local source_map. |
9e0c209e | 1514 | /// |
b7449926 | 1515 | /// Note that imported SourceFiles do not actually contain the source code of the |
9e0c209e SL |
1516 | /// file they represent, just information about length, line breaks, and |
1517 | /// multibyte characters. This information is enough to generate valid debuginfo | |
1518 | /// for items inlined from other crates. | |
b7449926 XL |
1519 | /// |
1520 | /// Proc macro crates don't currently export spans, so this function does not have | |
1521 | /// to work for them. | |
5099ac24 | 1522 | fn imported_source_files(self, sess: &Session) -> &'a [ImportedSourceFile] { |
ba9703b0 XL |
1523 | // Translate the virtual `/rustc/$hash` prefix back to a real directory |
1524 | // that should hold actual sources, where possible. | |
3dfed10e XL |
1525 | // |
1526 | // NOTE: if you update this, you might need to also update bootstrap's code for generating | |
1527 | // the `rust-src` component in `Src::run` in `src/bootstrap/dist.rs`. | |
ba9703b0 XL |
1528 | let virtual_rust_source_base_dir = option_env!("CFG_VIRTUAL_RUST_SOURCE_BASE_DIR") |
1529 | .map(Path::new) | |
1530 | .filter(|_| { | |
1531 | // Only spend time on further checks if we have what to translate *to*. | |
cdc7bbd5 | 1532 | sess.opts.real_rust_source_base_dir.is_some() |
ba9703b0 XL |
1533 | }) |
1534 | .filter(|virtual_dir| { | |
1535 | // Don't translate away `/rustc/$hash` if we're still remapping to it, | |
1536 | // since that means we're still building `std`/`rustc` that need it, | |
1537 | // and we don't want the real path to leak into codegen/debuginfo. | |
1538 | !sess.opts.remap_path_prefix.iter().any(|(_from, to)| to == virtual_dir) | |
1539 | }); | |
1540 | let try_to_translate_virtual_to_real = |name: &mut rustc_span::FileName| { | |
1541 | debug!( | |
1542 | "try_to_translate_virtual_to_real(name={:?}): \ | |
1543 | virtual_rust_source_base_dir={:?}, real_rust_source_base_dir={:?}", | |
cdc7bbd5 | 1544 | name, virtual_rust_source_base_dir, sess.opts.real_rust_source_base_dir, |
ba9703b0 XL |
1545 | ); |
1546 | ||
1547 | if let Some(virtual_dir) = virtual_rust_source_base_dir { | |
cdc7bbd5 | 1548 | if let Some(real_dir) = &sess.opts.real_rust_source_base_dir { |
ba9703b0 | 1549 | if let rustc_span::FileName::Real(old_name) = name { |
17df50a5 XL |
1550 | if let rustc_span::RealFileName::Remapped { local_path: _, virtual_name } = |
1551 | old_name | |
1552 | { | |
1553 | if let Ok(rest) = virtual_name.strip_prefix(virtual_dir) { | |
1554 | let virtual_name = virtual_name.clone(); | |
3dfed10e XL |
1555 | |
1556 | // The std library crates are in | |
1557 | // `$sysroot/lib/rustlib/src/rust/library`, whereas other crates | |
1558 | // may be in `$sysroot/lib/rustlib/src/rust/` directly. So we | |
1559 | // detect crates from the std libs and handle them specially. | |
1560 | const STD_LIBS: &[&str] = &[ | |
1561 | "core", | |
1562 | "alloc", | |
1563 | "std", | |
1564 | "test", | |
1565 | "term", | |
1566 | "unwind", | |
1567 | "proc_macro", | |
1568 | "panic_abort", | |
1569 | "panic_unwind", | |
1570 | "profiler_builtins", | |
1571 | "rtstartup", | |
1572 | "rustc-std-workspace-core", | |
1573 | "rustc-std-workspace-alloc", | |
1574 | "rustc-std-workspace-std", | |
1575 | "backtrace", | |
1576 | ]; | |
1577 | let is_std_lib = STD_LIBS.iter().any(|l| rest.starts_with(l)); | |
1578 | ||
1579 | let new_path = if is_std_lib { | |
1580 | real_dir.join("library").join(rest) | |
1581 | } else { | |
1582 | real_dir.join(rest) | |
1583 | }; | |
1584 | ||
ba9703b0 XL |
1585 | debug!( |
1586 | "try_to_translate_virtual_to_real: `{}` -> `{}`", | |
1587 | virtual_name.display(), | |
1588 | new_path.display(), | |
1589 | ); | |
17df50a5 XL |
1590 | let new_name = rustc_span::RealFileName::Remapped { |
1591 | local_path: Some(new_path), | |
ba9703b0 XL |
1592 | virtual_name, |
1593 | }; | |
1594 | *old_name = new_name; | |
1595 | } | |
1596 | } | |
1597 | } | |
1598 | } | |
1599 | } | |
1600 | }; | |
1601 | ||
f9f354fc | 1602 | self.cdata.source_map_import_info.get_or_init(|| { |
e74abb32 XL |
1603 | let external_source_map = self.root.source_map.decode(self); |
1604 | ||
dfeec247 XL |
1605 | external_source_map |
1606 | .map(|source_file_to_import| { | |
1607 | // We can't reuse an existing SourceFile, so allocate a new one | |
1608 | // containing the information we need. | |
1609 | let rustc_span::SourceFile { | |
ba9703b0 | 1610 | mut name, |
dfeec247 XL |
1611 | src_hash, |
1612 | start_pos, | |
1613 | end_pos, | |
1614 | mut lines, | |
1615 | mut multibyte_chars, | |
1616 | mut non_narrow_chars, | |
1617 | mut normalized_pos, | |
1618 | name_hash, | |
1619 | .. | |
1620 | } = source_file_to_import; | |
1621 | ||
17df50a5 XL |
1622 | // If this file is under $sysroot/lib/rustlib/src/ but has not been remapped |
1623 | // during rust bootstrapping by `remap-debuginfo = true`, and the user | |
1624 | // wish to simulate that behaviour by -Z simulate-remapped-rust-src-base, | |
1625 | // then we change `name` to a similar state as if the rust was bootstrapped | |
1626 | // with `remap-debuginfo = true`. | |
1627 | // This is useful for testing so that tests about the effects of | |
1628 | // `try_to_translate_virtual_to_real` don't have to worry about how the | |
1629 | // compiler is bootstrapped. | |
1630 | if let Some(virtual_dir) = | |
1631 | &sess.opts.debugging_opts.simulate_remapped_rust_src_base | |
1632 | { | |
1633 | if let Some(real_dir) = &sess.opts.real_rust_source_base_dir { | |
1634 | if let rustc_span::FileName::Real(ref mut old_name) = name { | |
1635 | if let rustc_span::RealFileName::LocalPath(local) = old_name { | |
1636 | if let Ok(rest) = local.strip_prefix(real_dir) { | |
1637 | *old_name = rustc_span::RealFileName::Remapped { | |
1638 | local_path: None, | |
1639 | virtual_name: virtual_dir.join(rest), | |
1640 | }; | |
1641 | } | |
1642 | } | |
1643 | } | |
1644 | } | |
1645 | } | |
1646 | ||
ba9703b0 XL |
1647 | // If this file's path has been remapped to `/rustc/$hash`, |
1648 | // we might be able to reverse that (also see comments above, | |
1649 | // on `try_to_translate_virtual_to_real`). | |
ba9703b0 XL |
1650 | try_to_translate_virtual_to_real(&mut name); |
1651 | ||
dfeec247 XL |
1652 | let source_length = (end_pos - start_pos).to_usize(); |
1653 | ||
1654 | // Translate line-start positions and multibyte character | |
1655 | // position into frame of reference local to file. | |
1656 | // `SourceMap::new_imported_source_file()` will then translate those | |
1657 | // coordinates to their new global frame of reference when the | |
1658 | // offset of the SourceFile is known. | |
1659 | for pos in &mut lines { | |
1660 | *pos = *pos - start_pos; | |
1661 | } | |
1662 | for mbc in &mut multibyte_chars { | |
1663 | mbc.pos = mbc.pos - start_pos; | |
1664 | } | |
1665 | for swc in &mut non_narrow_chars { | |
1666 | *swc = *swc - start_pos; | |
1667 | } | |
1668 | for np in &mut normalized_pos { | |
1669 | np.pos = np.pos - start_pos; | |
1670 | } | |
62682a34 | 1671 | |
ba9703b0 | 1672 | let local_version = sess.source_map().new_imported_source_file( |
dfeec247 | 1673 | name, |
dfeec247 XL |
1674 | src_hash, |
1675 | name_hash, | |
1676 | source_length, | |
ba9703b0 | 1677 | self.cnum, |
dfeec247 XL |
1678 | lines, |
1679 | multibyte_chars, | |
1680 | non_narrow_chars, | |
1681 | normalized_pos, | |
ba9703b0 XL |
1682 | start_pos, |
1683 | end_pos, | |
dfeec247 XL |
1684 | ); |
1685 | debug!( | |
1686 | "CrateMetaData::imported_source_files alloc \ | |
74b04a01 XL |
1687 | source_file {:?} original (start_pos {:?} end_pos {:?}) \ |
1688 | translated (start_pos {:?} end_pos {:?})", | |
dfeec247 XL |
1689 | local_version.name, |
1690 | start_pos, | |
1691 | end_pos, | |
1692 | local_version.start_pos, | |
1693 | local_version.end_pos | |
1694 | ); | |
e74abb32 | 1695 | |
dfeec247 XL |
1696 | ImportedSourceFile { |
1697 | original_start_pos: start_pos, | |
1698 | original_end_pos: end_pos, | |
1699 | translated_source_file: local_version, | |
1700 | } | |
1701 | }) | |
1702 | .collect() | |
e74abb32 XL |
1703 | }) |
1704 | } | |
74b04a01 | 1705 | } |
0531ce1d | 1706 | |
74b04a01 XL |
1707 | impl CrateMetadata { |
1708 | crate fn new( | |
1709 | sess: &Session, | |
1710 | blob: MetadataBlob, | |
1711 | root: CrateRoot<'static>, | |
1712 | raw_proc_macros: Option<&'static [ProcMacro]>, | |
1713 | cnum: CrateNum, | |
1714 | cnum_map: CrateNumMap, | |
3dfed10e | 1715 | dep_kind: CrateDepKind, |
74b04a01 XL |
1716 | source: CrateSource, |
1717 | private_dep: bool, | |
1718 | host_hash: Option<Svh>, | |
1719 | ) -> CrateMetadata { | |
74b04a01 XL |
1720 | let trait_impls = root |
1721 | .impls | |
1722 | .decode((&blob, sess)) | |
1723 | .map(|trait_impls| (trait_impls.trait_id, trait_impls.impls)) | |
1724 | .collect(); | |
5e7ed085 FG |
1725 | let incoherent_impls = root |
1726 | .incoherent_impls | |
1727 | .decode((&blob, sess)) | |
1728 | .map(|incoherent_impls| (incoherent_impls.self_ty, incoherent_impls.impls)) | |
1729 | .collect(); | |
74b04a01 XL |
1730 | let alloc_decoding_state = |
1731 | AllocDecodingState::new(root.interpret_alloc_index.decode(&blob).collect()); | |
1732 | let dependencies = Lock::new(cnum_map.iter().cloned().collect()); | |
c295e0f8 XL |
1733 | |
1734 | // Pre-decode the DefPathHash->DefIndex table. This is a cheap operation | |
1735 | // that does not copy any data. It just does some data verification. | |
1736 | let def_path_hash_map = root.def_path_hash_map.decode(&blob); | |
1737 | ||
74b04a01 XL |
1738 | CrateMetadata { |
1739 | blob, | |
1740 | root, | |
74b04a01 | 1741 | trait_impls, |
5e7ed085 | 1742 | incoherent_impls, |
74b04a01 | 1743 | raw_proc_macros, |
f9f354fc | 1744 | source_map_import_info: OnceCell::new(), |
c295e0f8 | 1745 | def_path_hash_map, |
136023e0 | 1746 | expn_hash_map: Default::default(), |
74b04a01 | 1747 | alloc_decoding_state, |
74b04a01 XL |
1748 | cnum, |
1749 | cnum_map, | |
1750 | dependencies, | |
1751 | dep_kind: Lock::new(dep_kind), | |
5099ac24 | 1752 | source: Lrc::new(source), |
74b04a01 XL |
1753 | private_dep, |
1754 | host_hash, | |
1755 | extern_crate: Lock::new(None), | |
3dfed10e XL |
1756 | hygiene_context: Default::default(), |
1757 | def_key_cache: Default::default(), | |
1758 | def_path_hash_cache: Default::default(), | |
e74abb32 | 1759 | } |
b039eaaf | 1760 | } |
60c5eb7d XL |
1761 | |
1762 | crate fn dependencies(&self) -> LockGuard<'_, Vec<CrateNum>> { | |
1763 | self.dependencies.borrow() | |
1764 | } | |
1765 | ||
1766 | crate fn add_dependency(&self, cnum: CrateNum) { | |
1767 | self.dependencies.borrow_mut().push(cnum); | |
1768 | } | |
1769 | ||
1770 | crate fn update_extern_crate(&self, new_extern_crate: ExternCrate) -> bool { | |
1771 | let mut extern_crate = self.extern_crate.borrow_mut(); | |
1772 | let update = Some(new_extern_crate.rank()) > extern_crate.as_ref().map(ExternCrate::rank); | |
1773 | if update { | |
1774 | *extern_crate = Some(new_extern_crate); | |
1775 | } | |
1776 | update | |
1777 | } | |
1778 | ||
1779 | crate fn source(&self) -> &CrateSource { | |
5099ac24 | 1780 | &*self.source |
60c5eb7d XL |
1781 | } |
1782 | ||
3dfed10e | 1783 | crate fn dep_kind(&self) -> CrateDepKind { |
60c5eb7d XL |
1784 | *self.dep_kind.lock() |
1785 | } | |
1786 | ||
3dfed10e | 1787 | crate fn update_dep_kind(&self, f: impl FnOnce(CrateDepKind) -> CrateDepKind) { |
60c5eb7d XL |
1788 | self.dep_kind.with_lock(|dep_kind| *dep_kind = f(*dep_kind)) |
1789 | } | |
1790 | ||
1791 | crate fn panic_strategy(&self) -> PanicStrategy { | |
1792 | self.root.panic_strategy | |
1793 | } | |
1794 | ||
1795 | crate fn needs_panic_runtime(&self) -> bool { | |
1796 | self.root.needs_panic_runtime | |
1797 | } | |
1798 | ||
1799 | crate fn is_panic_runtime(&self) -> bool { | |
1800 | self.root.panic_runtime | |
1801 | } | |
1802 | ||
60c5eb7d XL |
1803 | crate fn is_profiler_runtime(&self) -> bool { |
1804 | self.root.profiler_runtime | |
1805 | } | |
1806 | ||
1807 | crate fn needs_allocator(&self) -> bool { | |
1808 | self.root.needs_allocator | |
1809 | } | |
1810 | ||
1811 | crate fn has_global_allocator(&self) -> bool { | |
1812 | self.root.has_global_allocator | |
1813 | } | |
1814 | ||
1815 | crate fn has_default_lib_allocator(&self) -> bool { | |
1816 | self.root.has_default_lib_allocator | |
1817 | } | |
1818 | ||
1819 | crate fn is_proc_macro_crate(&self) -> bool { | |
1820 | self.root.is_proc_macro_crate() | |
1821 | } | |
1822 | ||
1823 | crate fn name(&self) -> Symbol { | |
1824 | self.root.name | |
1825 | } | |
1826 | ||
136023e0 XL |
1827 | crate fn stable_crate_id(&self) -> StableCrateId { |
1828 | self.root.stable_crate_id | |
60c5eb7d XL |
1829 | } |
1830 | ||
1831 | crate fn hash(&self) -> Svh { | |
1832 | self.root.hash | |
1833 | } | |
74b04a01 | 1834 | |
3dfed10e XL |
1835 | fn num_def_ids(&self) -> usize { |
1836 | self.root.tables.def_keys.size() | |
1837 | } | |
1838 | ||
74b04a01 XL |
1839 | fn local_def_id(&self, index: DefIndex) -> DefId { |
1840 | DefId { krate: self.cnum, index } | |
1841 | } | |
1842 | ||
1843 | // Translate a DefId from the current compilation environment to a DefId | |
1844 | // for an external crate. | |
1845 | fn reverse_translate_def_id(&self, did: DefId) -> Option<DefId> { | |
1846 | for (local, &global) in self.cnum_map.iter_enumerated() { | |
1847 | if global == did.krate { | |
1848 | return Some(DefId { krate: local, index: did.index }); | |
1849 | } | |
1850 | } | |
1851 | ||
1852 | None | |
1853 | } | |
a7813a04 | 1854 | } |
e1599b0c XL |
1855 | |
1856 | // Cannot be implemented on 'ProcMacro', as libproc_macro | |
74b04a01 | 1857 | // does not depend on librustc_ast |
e1599b0c XL |
1858 | fn macro_kind(raw: &ProcMacro) -> MacroKind { |
1859 | match raw { | |
1860 | ProcMacro::CustomDerive { .. } => MacroKind::Derive, | |
1861 | ProcMacro::Attr { .. } => MacroKind::Attr, | |
dfeec247 | 1862 | ProcMacro::Bang { .. } => MacroKind::Bang, |
e1599b0c XL |
1863 | } |
1864 | } |